Surf Forecasts:
How big are the waves at Castlerock today (04 Aug):
- Morning surf: Morning surf (04 Aug, local time) - 1ft (0.3m), 6s period with NNW swell.
- Afternoon surf: Afternoon surf (04 Aug, local time) - 1ft (0.3m), 8s period with NNW swell.
- Evening surf: Evening surf (04 Aug, local time) - 1.5ft (0.4m), 9s period with NNW swell.
The current surf forecast for Castlerock at 2AM is: 0.2m 8s primary swell from a North-northwest direction and 0.1m 6s secondary swell from a Northwest direction, 0.5m 4s secondary swell from a East direction (forecast issued at 06:00pm August 03). The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (04 Aug) | 1ft (0.3m) | 6s |
| Afternoon (04 Aug) | 1ft (0.3m) | 8s |
| Evening (04 Aug) | 1.5ft (0.4m) | 9s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 39mm), heaviest during Mon night. Very mild (max 19°C on Tue afternoon, min 13°C on Tue night). Winds increasing (light winds from the WSW on Tue afternoon, near gales from the W by Wed morning). | |||||||||||||||||||
Mon 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||||
4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | NNW 9 | NW 7 | NNW 9 | E 4 | N 8 | NNW 6 | NNW 6 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 10 | NNW 10 | WNW 6 | NW 8 | NW 9 | NW 9 | NW 9 | NW 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 15 | 8 | 7 | 7 | 6 | 8 | 8 | 6 | 11 | 12 | 34 | 52 | 67 | 75 | 314 | 430 | 427 | 297 | 398 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-on | cross-off | cross-off | cross-off | cross | cross-off | cross | cross | cross-on | cross-on |
High Tide | 9:54PM1.75m | 10:04AM1.45m | 10:33PM1.64m | 10:49AM1.36m | |||||||||||||||
Low Tide | 3:32PM0.20m | 4:19AM0.37m | 4:06PM0.30m | 4:58AM0.43m | 4:51PM0.41m | ||||||||||||||
 |  |  |  |  | | |  | |  |  | | | | | | | |  | |
 | — | — | — | — | 5:39 | — | — | — | — | — | — | — | 5:41 | — | — | — | — | — | — |
 | — | 9:27 | — | — | — | — | — | — | — | 9:24 | — | — | — | — | — | — | — | 9:22 | — |
mm | 1 | — | — | 10 | 5 | 2 | 2 | 1 | 1 | 2 | — | — | — | 2 | 1 | 1 | 3 | 4 | 1 |
Temp °C | 18 | 18 | 17 | 14 | 15 | 15 | 16 | 18 | 19 | 16 | 15 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 |
Feels °C | 15 | 18 | 15 | 11 | 11 | 13 | 15 | 18 | 19 | 15 | 12 | 10 | 10 | 6 | 5 | 3 | 4 | 6 | 7 |
Swell 1 Height (m) Direction Period (s) | NW 7 | NW 7 | ENE 4 | NNW 8 | NNW 6 | NNW 6 | ESE 4 | E 4 | E 4 | NNW 8 | NNW 9 | NNW 10 | NNW 10 | NNW 10 | NW 8 | NW 9 | NW 9 | — | NNW 10 |
| kJ | 7 | 7 | 6 | 7 | 4 | 8 | 16 | 9 | 6 | 12 | 34 | 52 | 67 | 43 | 314 | 430 | 427 | — | 35 |
Swell 2 Height (m) Direction Period (s) | NNW 9 | NNW 9 | NNW 9 | NW 6 | N 8 | N 8 | NNW 6 | NNW 8 | NNW 8 | E 4 | E 4 | — | — | — | — | — | — | — | — |
| kJ | 15 | 8 | 7 | 2 | 6 | 6 | 8 | 6 | 11 | 3 | 1 | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | W 10 | — | NW 6 | — | — | — | N 8 | NNW 6 | — | NW 6 | — | — | — | — | — | — | — | — | — |
| kJ | 2 | — | 7 | — | — | — | 1 | 4 | — | 2 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ENE 3 | E 4 | ENE 4 | E 4 | ESE 4 | ESE 5 | — | — | — | — | W 2 | W 2 | WNW 5 | WNW 6 | W 4 | W 5 | — | NW 9 | NW 8 |
| kJ | 3 | 7 | 4 | 6 | 13 | 24 | — | — | — | — | 1 | 1 | 4 | 75 | 22 | 81 | — | 297 | 398 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 40 | 40 | 40 | 40 | 40 | 40 | 27 | 44 | 54 | 54 | 54 | 27 | 9 | 313 | 144 | 144 | 378 | 772 | 751 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||
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