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  • Weather Data

    Speedwell Weather supplies high-quality historical observed weather data and real time weather data feeds for tens of thousands of sites world-wide.

    Our unique SuperPack® product provides unlimited group-wide access to our entire weather data archive of thousands of data sets and real-time feeds for a single subscription. Our archives cover daily, hourly and sub-hourly data providing both history and real-time feeds. Our clients are companies world-wide in sectors including energy, agriculture, commodity-trading, renewables, retail, insurance and weather risk markets. Speedwell's origins as a weather data provider lie in the weather risk markets where we are the dominant provider of weather data for pricing weather risk contracts and where we are the dominant settlement agent for over-the-counter weather risk transactions.

    Speedwell Recalibrated Data Sets re-base historical temperature data for important reference sites by adjusting for known or observed discontinuities that have accumulated over the life time of the observations.
  • Weather Forecasts

    Speedwell Weather supplies site-specific ensemble forecasts across the world covering 15-day and monthly periods.

    The ensemble forecast is a probabilistic forecast which inherently captures information that is normally lost in a traditional deterministic forecast.

    Forecasts can be delivered both with interactive web-delivered tools and as underlying data. Web-based forecast delivery gives users the ability to view, interrogate, and verify archived forecasts as well as overlay historical data.

    Speedwell Weather supplies forecasts to clients in energy, agriculture and weather risk markets across the globe.
  • Weather Derivative Software

    Speedwell Weather supplies the definitive enterprise weather derivative pricing and risk management system, the Speedwell Weather System, SWS.

    Available as a hosted application or internally-installed SWS consists of many millions of lines of code representing over a decade of continuous development to produce a tool that provides a consistent and reliable framework for valuing weather hedges, for managing a portfolio of weather risk and for the process of seeing those transactions through all back office stages to final settlement. We have a philosophy of transparency: no black boxes and full documentation of methods. All SWS outputs are easily exportable, and all components are re-usable in 3rd party systems, subject to licence.

    SWSConnect is a web-delivered weather derivative pricing tool based on the same underlying components as SWS. Ideal for pricing CME weather derivative contracts.

  • Weather Risk Placement and Consultancy

    Speedwell Weather Derivatives Limited, authorised and regulated by the UK Financial Conduct Authority, are experts in analysing, structuring and placing weather risk.

    In our capacity as a regulated independent consultancy we are able to assist companies in quantifying their weather exposure and then to structure and place such risk with the weather risk-taking community.


    Since we were founded in 1999, we have cultivated extensive relationships in the weather risk-taking community amongst all types of participants. These include insurance companies, banks, energy companies and investment funds. We do not act as principals ourselves and nor are we exclusively aligned to a single principal.

    Financial Conduct Authority

    Speedwell Weather Derivatives Limited is authorised and regulated by the financial regulator in the United Kingdom, the Financial Conduct Authority.

  • Other Services

    Speedwell Weather offers a wide range of other complementary services.

    These include:

What's New

Click here for downloadable documents about our products and services

10th April 2014 We continue to expand our agri-weather data sets and forecasts. We have added packs covering the Ukraine Soybean area, Iran Spring and Winter Wheat, cotton in Burkina Faso and Benin, Rabi Rice in India and spring wheat in Morocco amongst others.

9th April 2014 We now offer 15 packs covering hydro catchment areas in China, Australia and Europe. These packs provide cleaned histories, cleaned feeds and ECMWF-based probabilistic ensemble forecasts

8th April 2014 Our list of available high-quality downscaled ensemble forecasts based on the ECMWF model continues to grow. We now offer over 2,000. We only produce forecasts where we also have high-quality ground truth.

3th April 2014 We have added population-weighted data sets and forecasts for Argentina and Chile. These include a weighted basket of historical data and ensemble forecasts based on both the ECMWF and GFS models.

20th February 2014 We are pleased to announce the release of SWS Version 9. The Speedwell Weather System is the dominant software for pricing weather risk and managing a portfolio of weather risk contracts. Version 9 sees significant back and middle office enhancements including new regulatory reporting features required under Dodd Frank and EMIR. Click here for more information

31st January 2014 SWS Version 9 is close to Beta release. The Speedwell Weather System is the dominant software for pricing weather risk and managing a portfolio of weather risk contracts. Version 9 sees significant back and middle office enhancements including new regulatory reporting features required under Dodd Frank and EMIR. Click here for more information.

30th January 2014 Speedwell Weather has released SettleCast®, a new forecast product designed for weather risk contracts which settle on forecast values rather than observed values. We see this as an important extension of the weather risk markets in which we have been involved as data provider and settlement agent for over a decade. SettleCast forecasts are tailored to the needs of the specific energy market convention they serve and is currently available for over 80 European sites (here) based on the standard European gas-day convention. Please click here for more information. 

29th January 2014 Speedwell Weather is acting as settlement agent for what is believed to be the biggest weather risk transfer transaction to date brought by World Bank on behalf of the Uruguay state-run utility company, UTE, and based on rainfall in Uruguay/Brazil. Our involvement has included data sourcing, data quality control and the installation of weather stations. We are providing quality controlled data for settlement of the transaction and acting as settlement agent. Please click here for the press release.

28th January 2014 We are pleased to announce a partnership with ZE Group Inc, a global leader in enterprise data management solutions. Speedwell weather data is now available through ZE's ZEMA suite. Please click here for more information.  

12th December 2013 We are delighted, for the sixth year in a row, to be awarded Best Global Weather Risk Management Advisory/Data Service 2013, by Environmental Finance and Carbon Finance. The survey - the most closely watched poll of sentiment across carbon, renewable energy, weather risk and US emissions markets - reveals those firms that their clients, peers and competitors have judged to have provided the best service over the previous twelve months. See here for the full article. 

25th October 2013 We have expanded our range of population-weighted data-sets and forecasts. We call these FlexIndexes. These are used for modelling energy demand. The product includes an ensemble forecast based on the individual down-scaled forecasts of the component sites, the historical data set, smoothed climatology and data feeds. Click here to see our standard sites. Click here for some more information. 

17th October 2013 Speedwell Product Focus Autumn 2013 click here

9th October 2013  We are pleased to release the first of our European Gas-Day Forecasts sites For these sites we provide a down-scaled ensemble forecast based on the average of hourly temperatures for the 0600 to 0500 time period, matching the trading convention of many gas markets in Europe. This product is based on the 15-day ECMWF forecast model. See here for the sites available. Please contact us for verification statistics.

2nd October 2013 Agri-Pack update: we now provide over 150 packs covering regional crop growing areas. These provide daily temperature and rainfall histories for the basket of sites as well as feeds and forecasts. click here to see the available baskets.

27th September 2013 We have updated our International Hydro Correlation Study. Please contact us for information and prices. 

27th August 2013 Speedwell Newsletter August 2013. An update about our population weighted forecasts and data sets; packs for tracking global commodities; Forecast SuperPack and FastCast®-Multi. Click here to view. Click here for more information about FlexIndexes

7th August 2013: Agri data and forecasts: We have greatly expanded the range of data packs with cleaned histories and feeds for agriculture. Please click here to go to our map tool showing our agri-related packs.

28th June 2013 Flex Indexes: Population Weighted histories and forecasts: We have satisfied a number of requests recently for bespoke weighted basket forecasts. We call these Flex-Indexes. A Flex Index comprises a cleaned history, smoothed climatologies, cleaned feeds and associated downscaled ensemble forecasts based on 15-day ECMWF & GFS and the monthly ECMWF. A Flex can be created with any number of sites with any weights on request. These tend to be used for longer-term power trading. Currently available Flex Indexes can be seen here

25th June 2013 Ensemble Forecasts Baskets for Agri: We have produced a range of basket forecasts for Agri areas focusing on particular crops in each growing region. The forecasts are based on ECMWF and/or GFS 15 day and ECMWF monthly models. Each index comes with cleaned history, feeds and climatology. Current Agri indexes can be seen here 

20th June 2013 Cleaned Data UpdateWe are delighted to report that we now quality control over 5,000 sites per day and are able to provide cleaned temperature or rainfall histories for over 5,000 sites world-wide. 

18th April 2013 Recalibrated data sets: We have issued the latest 6-monthly updates and extended the historical Recalibrated data reflecting recent discontinuities at the 24 US CME sites. Click  here for more information

3rd April 2013 London and Charleston March 2013...cold. Click here for a note on temperatures in March in these two cities.

28th March 2013 Dr Michael Moreno will be giving a technical presentation on weather insurance at the AssurFinance event in Paris on April 9th. To find out more and to join us, please follow this link: http://assurfinance2013.actuariacnam.net

25th March 2013 New ..Click here to see our Beta of FastCast-Multi Site showing multi-model forecast change for any four regions simultaneously.

winner 27th February 2013 We are delighted to have been voted first in the Energy Risk Magazine rankings under the new Weather Data Management category. We would like to thank our clients for their support.

25th February 2013 Please click here for the second in our series of educational papers: The Limitations of the GSOD Data Set

15th February 2013 Forecasts based on population weighted baskets ("Flexes") are now also available for Italy, Spain, Netherlands, Scandinavia, Denmark, Sweden and Norway. Used to model regional energy demand, for each Flex we supply fully downscaled probabilistic forecasts based on both the ECMWF and GFS models as well as a history of the weighted basket and daily feeds. Click here to see all our on our map tool. For a trial or further details please contact us here .

14th January 2013 Occasional Paper: Common misconceptions about weather data. Click here to view.

13th December 2012 We are delighted, for the fifth year in a row, to be awarded Best Global Weather Risk Management Advisory/Data Service 2012, by Environmental Finance and Carbon Finance. The survey - the most closely watched poll of sentiment across carbon, renewable energy, weather risk and US emissions markets - reveals those firms that their clients, peers and competitors have judged to have provided the best service over the previous twelve months.

12th December 2012 Speedwell Newsletter Dec 2012. An update about our downscaled forecasts. click here to view.

9th November 2012 Please click here for white paper on the impact on the UK Gas Market CWV calculation of the closure of Birmingham Edgbaston.

17th October 2012 Please click here for our latest newsletter about weather data services for agriculture.

23rd August 2012
We are pleased to announce the release of our new forecast dashboard displaying multiple forecast models for multiple sites in one view. Please click here for more information. Click here to see the product with example sites

11th July 2012
Please click here for our July newsletter about weather data for agriculture.

5th July 2012 We have released our new map tool. This shows over 10,000 of our standard data sets which are available to SuperPack® and SuperPack Light customers. The new tool now allows for searches (eg "find all sites with 100% complete TMax over 20 years") and provides convenient access to tools. Please click here to view.

15th June 2012
We have released a new product which provides a vast amount of historical and real-time weather data  of high quality for clients who have a large appetite for international data but do not need the full-service provided under SuperPack®. The new product is called SuperPack-Light. SuperPack-Light provides access to 1,500 user-specified data sets chosen from over 10,000 which include over 3,000 cleaned data sets and over 2,000 cleaned feeds as well as many thousands of official climate data sets. All at zero marginal cost and with the simplicity of a single contract. Please click here for more information.

10th June 2012
We are pleased to be winning more and more clients who require weather data for crop-modelling. We have recently released a large number of weather data packs available to SuperPack and SuperPack-Light clients including, amongst many others, cleaned data for Argentina, Ivory Coast, Pakistan, Russia and Ukraine. Please click here to see our data packs.

1st May 2012 After many man years of development and over a decade of evolution we are pleased to announce the release of SWS 8.0, the latest version of the pre-eminent weather derivative pricing and risk management software. Click here for the press release.

26th March 2012
Extended Recalibrated Data Sets: Many sites in the USA shows significant temperature discontinuities over their history. Our Recalibrated Data Sets adjust for these by producing a data set consistent with current observation conditions/location and instruments. After a number of years of providing these for CME weather derivative reference sites, we will soon be releasing a pack of over 200. Subscribers will receive the adjusted time series of TMin and TMax and have access to monitors alerting to any current changes in site behaviour.

25th January 2012
We are posting updates on the behaviour of weather reference sites for our Recalibrated Data clients on a new page. This requires user login. Please click here and choose the Recalibrated Data Set Apps  tab. This allows us to post updates between our regular monthly updates. Click here information about Recalibrated Data Sets.

14th December 2011 Speedwell Weather is awarded Best Global Weather Risk Management Advisory/Data Service 2011 , by Environmental Finance and Carbon Finance. The survey - the most closely watched poll of sentiment across carbon, renewable energy, weather risk and US emissions markets - reveals those firms that their clients, peers and competitors have judged to have provided the best service over the previous twelve months. Please click here for the press release.

5th December 2011
Please click here for an analysis of November London Heathrow temperatures in historical context.

1st December 2011
We are now able to supply the RAW ECMWF output as well as the downscaled 15-day product. Please see here for more information.

21st November 2011
Our downscaled ECMWF monthly forecast is now available twice per week on Thursdays and now Mondays.

9th November 2011
We have had a lot of requests recently for snow data in the USA and Europe and for solar radiation data in Europe. We have cleaned dozens of snowfall data sets for many of our SuperPack clients (for no extra charge..all part of the service). Solar radiation data can be tough to find in Europe. We can provide HOURLY solar radiation data for sites in the UK, Netherlands and Germany.

3rd November 2011 UK: We have moved into our new office premises in Harpenden. Our address is the same but we now occupy a complete floor of the building. The new office provides us with a more pleasant and more efficient working space and the room we need to continue growing.

20th October 2011
Recalibrated data sets: We have just issued the latest 6-monthly updates to data packs for key US sites to reflect recent changes at the 24 US CME sites. We have identified significant discontinuities in two stations one of which is more than 2 degrees F.

March 2011
The data team have had a busy quarter fielding an unusually wide range of client requests for weather data and feeds. SuperPack (our open subscription to ALL our data) continues to grow as a result: expansion of our cleaned US snowfall sets; addition of more hourly wind data for UK; expansion of our Swiss data sets; expansion of UK snowfall data sets, Brazilian hourly, Danish hourly, Thai daily, Korean solar radiation and the addition of another US non-government US network. SuperPack provides access to data not already in our archives on a reasonable-request basis. More often than not, we find it!

5th January 2011
- Cold December 2010: an update. Click here to see a summary of how key European cities, a 150 year proxy for Heathrow and the CET have turned out.

23rd December 2010
- We are delighted to have been voted Best Advisory/Data Service Provider in the Weather Risk Management category of the 2010 Environmental Finance market survey.
- SuperPack Update: We have added two more private networks in the USA: FAWN and CoAg. These extend our coverage for sites in Florida and Colorado and in particular provide solar radiation data not available through the NCDC network.

2nd December 2010
- Speedwell Weather System software development update: Click here for an update on what the development team is working on.
- SuperPack update: We have just added Korean climate data and feeds including sunshine and solar radiation. Click here to see other data sets we have added recently. Click here for Map Viewer / Data Audit Tool. As a reminder to SuperPack clients, if a site or weather variable you need is not on the list..just ask. We can usually find it. Usually for no extra charge.
- SWSConnect: we are seeing more users on SWSConnect which is our web-delivered version of SWS.. and so we are responding to requests to add functionality that has always been available on the full version of SWS. With the latest release users can now select El Nino or La Nina years for pricing (logon required).

20th November 2010
- Recalibrated Data: there seems to be a lot going on with US CME sites in the update this month. For users unfamiliar with the product, these data sets adjust key US and European sites for historic site moves and instrument discontinuities. The difference over a 50 year period can be VERY significant with the biggest magnitude difference being >2.5F on TMin and > 1.6 on TMax DAILY

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