For Contractors
Win More Work. Deliver on Time. Defend Every Claim.
WeatherWise gives contractors data-driven weather intelligence across the full project lifecycle — from competitive tendering through proactive delivery to defensible extension of time claims.
Weather Risk Is Costing You Projects
Most contractors still price weather using flat-rate allowances — a percentage uplift based on experience or regional averages. This approach means you either overprice and lose tenders, or underprice and absorb the cost when weather hits harder than expected.
On site, weather management is reactive. Teams check the forecast each morning and make ad-hoc decisions about which activities to run or pause. Without activity-level thresholds linked to the programme, opportunities to resequence work around weather windows are missed, and disruption compounds.
When delays occur, building a defensible weather claim takes weeks of manual evidence gathering. Matching daily weather records to contract thresholds, proving which activities were genuinely affected, and demonstrating the delay was unforeseeable is laborious — and often results in disputed, undervalued claims.
Three Pillars of Weather Intelligence
WeatherWise supports contractors across the entire project lifecycle — from winning the work to delivering it on time to recovering costs when weather disrupts.
Tendering & ECI
Data-Driven Weather Allowances
Replace flat-rate percentages with activity-specific workable day calculations based on 45+ years of historical weather data for the exact project location. Know precisely how many days each activity is likely to lose to weather.
Accurate Pricing
Price weather risk with confidence using probabilistic models that show the range of outcomes — from best case to worst case. Build contingency that reflects actual risk rather than guesswork, winning more work at sustainable margins.
Competitive Edge
Present clients with transparent, data-backed weather methodology in your tender submission. Demonstrate sophistication and build confidence that your programme and pricing are grounded in objective analysis.
Delivery & Scheduling
Schedule-Integrated Forecasting
14-day forecasts calibrated to your activity thresholds, overlaid directly on your programme from P6, Asta, or MS Project. See which activities will be impacted this week and next, not just whether it will rain.
Activity-Level Alerts
Automated alerts when weather conditions are forecast to breach the thresholds for specific activities. Site managers and planners get advance warning to resequence work, mobilise alternative activities, or stand down resources before costs are incurred.
Proactive Replanning
Move from reactive to proactive weather management. Use workable day probability windows to schedule weather-sensitive activities during the best available periods and keep less sensitive work for higher-risk days.
Claims & Evidence
NEC4 / JCT / FIDIC Evidence
Automatically generated evidence packages aligned to your contract form. For NEC4, this includes the 10-year rolling average comparison required under clause 60.1(13). For JCT, adverse weather event logs against contractual thresholds.
Daily Weather Records
Continuous, automated recording of weather conditions at your site location. No more reliance on manual site diaries or nearest Met Office stations. Every day is logged with 80+ weather variables at hourly resolution.
EOT Support
Build extension of time applications in hours rather than weeks. WeatherWise identifies which days breached contractual thresholds, which activities were on the critical path, and whether the conditions were genuinely unforeseeable.
Works With Your Scheduling Tools
WeatherWise integrates directly with the planning software your teams already use, so there is no change to existing workflows.
Forecast accuracy
(peer-reviewed)
Projects supported
globally
Project value
supported
More accurate
than traditional methods
Built for Contractor Teams
Project Planners
Build weather-realistic programmes with workable day calendars integrated directly into P6 and Asta. Schedule weather-sensitive activities in optimal windows.
Commercial Managers
Price weather risk accurately at tender stage and build defensible claims when delays occur. Objective evidence replaces subjective arguments.
Site Managers
Get activity-level weather alerts that tell you which operations will be affected this week. Make proactive decisions rather than reactive ones.
Estimators
Replace guesswork with data when pricing weather risk in tenders. Activity-specific workable day analysis for any location and any time of year.
Claims Consultants
Access ready-made evidence packages for NEC4, JCT, and FIDIC weather claims. Automatic threshold breach analysis and 10-year average comparisons.
Risk Managers
Quantify weather risk with Monte Carlo probabilistic modelling. Understand the range of outcomes and set appropriate contingency levels.
Frequently Asked Questions
How does WeatherWise help with tendering?
What scheduling tools does it integrate with?
How does it support weather-related claims?
Can it help with extension of time claims?
How accurate is the weather data?
What does the contractor dashboard show?
Related Pages
WeatherWise for Clients
How client organisations use the Project Resilience Framework for portfolio-level weather risk management.
Tendering & ECI
Data-driven weather allowance calculations for competitive tender pricing.
Claims & Evidence
Contract-compliant weather evidence for NEC4, JCT, and FIDIC claims.
Forecasting & Alerts
14-day activity-calibrated forecasts with automated threshold alerts.
Monte Carlo Modelling
Probabilistic weather risk modelling for programme contingency planning.
Start Winning With Weather Data
See how WeatherWise gives your teams a competitive advantage — from sharper tenders through efficient delivery to defensible claims that recover every day you are owed.