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 Apr 2026 – 30 Apr 2026
Rainfall over this period was 98% 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
98%
76 mm vs 77 mm typical
Rain days >5mm
6
typical: 5.4
Frost days
0
typical: 1.0
High-wind days
3
gusts ≥ 47 mph
Daily record
| Date | Rain (mm) | Min °C | Max °C | Gust (mph) | Flags |
|---|---|---|---|---|---|
| 1 Apr 2026 | 0.6 | 7.9 | 12.1 | 29 | |
| 2 Apr 2026 | 1.0 | 4.4 | 11.3 | 23 | |
| 3 Apr 2026 | 7.6 | 8.3 | 12.1 | 39 | wet |
| 4 Apr 2026 | 3.9 | 7.8 | 11.7 | 55 | wind |
| 5 Apr 2026 | 0.6 | 6.5 | 10.0 | 49 | wind |
| 6 Apr 2026 | 0.0 | 4.9 | 13.9 | 34 | |
| 7 Apr 2026 | 0.0 | 9.0 | 20.8 | 37 | |
| 8 Apr 2026 | 0.0 | 9.3 | 19.7 | 18 | |
| 9 Apr 2026 | 1.1 | 6.3 | 11.4 | 37 | |
| 10 Apr 2026 | 1.5 | 3.8 | 9.8 | 36 | |
| 11 Apr 2026 | 17.4 | 6.1 | 9.7 | 53 | wet · wind |
| 12 Apr 2026 | 16.9 | 6.1 | 10.8 | 45 | wet |
| 13 Apr 2026 | 1.2 | 4.5 | 10.8 | 19 | |
| 14 Apr 2026 | 6.7 | 6.8 | 12.6 | 32 | wet |
| 15 Apr 2026 | 5.1 | 10.4 | 12.6 | 43 | wet |
| 16 Apr 2026 | 3.4 | 9.4 | 13.5 | 36 | |
| 17 Apr 2026 | 6.8 | 9.1 | 11.9 | 32 | wet |
| 18 Apr 2026 | 2.0 | 6.6 | 12.9 | 24 | |
| 19 Apr 2026 | 0.0 | 3.8 | 13.1 | 12 | |
| 20 Apr 2026 | 0.0 | 5.7 | 13.2 | 19 | |
| 21 Apr 2026 | 0.0 | 5.3 | 13.6 | 38 | |
| 22 Apr 2026 | 0.0 | 6.3 | 16.2 | 39 | |
| 23 Apr 2026 | 0.0 | 8.0 | 18.0 | 32 | |
| 24 Apr 2026 | 0.0 | 7.8 | 18.3 | 26 | |
| 25 Apr 2026 | 0.0 | 7.0 | 18.5 | 16 | |
| 26 Apr 2026 | 0.0 | 8.1 | 18.0 | 19 | |
| 27 Apr 2026 | 0.0 | 7.7 | 19.6 | 28 | |
| 28 Apr 2026 | 0.0 | 8.6 | 13.5 | 32 | |
| 29 Apr 2026 | 0.0 | 7.2 | 19.2 | 38 | |
| 30 Apr 2026 | 0.2 | 11.0 | 22.3 | 40 |
6 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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