Daily rainfall, frost and wind for Swansea against the 10-year average — the starting point for any weather delay conversation on site.
Weather delay record
SA1 1NW · 1 Oct 2025 – 31 Oct 2025
Rainfall over this period was 90% of the 10-year average for the same calendar window at this location. Conditions were broadly in line with typical for the time of year. 3 days had gusts at or above 47 mph.
Rainfall vs 10-yr avg
90%
157 mm vs 174 mm typical
Rain days >5mm
7
typical: 10.6
Frost days
0
typical: 0.1
High-wind days
3
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Oct 2025 | 0.9 | 13.2 | 16.7 | 21 | |
| 2 Oct 2025 | 3.6 | 13.6 | 16.7 | 31 | |
| 3 Oct 2025 | 30.2 | 13.9 | 17.3 | 53 | wet · wind |
| 4 Oct 2025 | 1.5 | 9.7 | 13.4 | 48 | wind |
| 5 Oct 2025 | 0.0 | 10.5 | 14.5 | 35 | |
| 6 Oct 2025 | 0.0 | 11.8 | 15.9 | 24 | |
| 7 Oct 2025 | 1.3 | 13.5 | 15.7 | 23 | |
| 8 Oct 2025 | 0.8 | 8.5 | 15.8 | 19 | |
| 9 Oct 2025 | 0.1 | 8.1 | 14.8 | 17 | |
| 10 Oct 2025 | 0.3 | 10.8 | 16.1 | 13 | |
| 11 Oct 2025 | 0.1 | 9.5 | 14.6 | 13 | |
| 12 Oct 2025 | 0.0 | 7.8 | 15.0 | 13 | |
| 13 Oct 2025 | 0.0 | 9.3 | 15.3 | 20 | |
| 14 Oct 2025 | 0.0 | 10.8 | 16.3 | 15 | |
| 15 Oct 2025 | 0.0 | 8.8 | 13.6 | 13 | |
| 16 Oct 2025 | 0.0 | 9.2 | 13.2 | 19 | |
| 17 Oct 2025 | 0.0 | 10.3 | 15.9 | 20 | |
| 18 Oct 2025 | 0.8 | 11.4 | 14.2 | 35 | |
| 19 Oct 2025 | 24.3 | 11.8 | 16.2 | 36 | wet |
| 20 Oct 2025 | 16.1 | 11.7 | 15.5 | 25 | wet |
| 21 Oct 2025 | 1.5 | 10.2 | 14.3 | 27 | |
| 22 Oct 2025 | 8.6 | 7.6 | 13.6 | 17 | wet |
| 23 Oct 2025 | 3.6 | 6.9 | 10.2 | 42 | |
| 24 Oct 2025 | 3.6 | 7.3 | 12.1 | 36 | |
| 25 Oct 2025 | 1.0 | 7.8 | 10.3 | 36 | |
| 26 Oct 2025 | 3.0 | 6.6 | 12.1 | 36 | |
| 27 Oct 2025 | 0.5 | 10.3 | 12.9 | 35 | |
| 28 Oct 2025 | 1.5 | 10.7 | 13.4 | 35 | |
| 29 Oct 2025 | 21.6 | 8.6 | 12.0 | 31 | wet |
| 30 Oct 2025 | 7.0 | 7.4 | 13.6 | 48 | wet · wind |
| 31 Oct 2025 | 25.3 | 12.4 | 14.3 | 45 | wet |
7 days with rainfall over 5 mm in this period.
Data: ERA5 reanalysis via Open-Meteo, taken at the nearest model grid point to the postcode — not a Met Office station record. Baselines are the mean of the same calendar months over the previous 10 years at this location. Whether conditions meet a contractual test (e.g. JCT “exceptionally adverse weather” or an NEC 1-in-10-year event) is a matter for the contract — this is a factual weather record, not advice.
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