Surf Forecasts:
How big are the waves at Castlerock today (25 Aug):
- Morning surf: Morning surf (25 Aug, local time) - 1.5ft (0.4m), 10s period with WNW swell.
- Afternoon surf: Afternoon surf (25 Aug, local time) - 1ft (0.3m), 9s period with WNW swell.
- Evening surf: Evening surf (25 Aug, local time) - 0.5ft (0.2m), 9s period with W swell.
The current surf forecast for Castlerock at 4PM is: 0.3m 9s primary swell from a West-northwest direction (forecast issued at 12:00pm August 25). An open ocean swell of 0.5m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (25 Aug) | 1.5ft (0.4m) | 10s |
| Afternoon (25 Aug) | 1ft (0.3m) | 9s |
| Evening (25 Aug) | 0.5ft (0.2m) | 9s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 2mm), mostly falling on Tue night. Very mild (max 19°C on Thu afternoon, min 14°C on Tue night). Wind will be generally light. | |||||||||||||||||||||
Tue 25 | Wednesday 26 | Thursday 27 | |||||||||||||||||||
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 | 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) | WNW 10 | WNW 10 | WNW 9 | WNW 9 | W 9 | ENE 3 | E 4 | E 5 | E 4 | E 4 | E 4 | ENE 4 | WNW 10 | WNW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NW 9 | WNW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 33 | 18 | 17 | 8 | 6 | 3 | 22 | 34 | 25 | 16 | 7 | 5 | 10 | 10 | 24 | 23 | 22 | 21 | 20 | 20 | 15 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | cross | cross-off | cross | cross | cross-off | cross-off | cross-off | cross | cross | cross-on | cross | glassy |
High Tide | 5:55PM1.59m | 5:58AM1.43m | 6:23PM1.72m | 6:26AM1.53m | 6:51PM1.84m | ||||||||||||||||
Low Tide | 11:46AM0.35m | 00:25AM0.38m | 12:17PM0.22m | 00:54AM0.29m | 12:45PM0.12m | ||||||||||||||||
 |  |  | |  |  | | | | | |  |  | |  | | | | | | | |
 | 6:18 | — | — | — | — | — | 6:20 | — | — | — | — | — | — | — | 6:22 | — | — | — | — | — | — |
 | — | — | — | 8:37 | — | — | — | — | — | — | — | 8:36 | — | — | — | — | — | — | — | 8:32 | — |
mm | — | — | — | — | — | 1 | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 17 | 18 | 17 | 16 | 14 | 14 | 14 | 15 | 16 | 17 | 17 | 16 | 16 | 15 | 14 | 16 | 18 | 19 | 18 | 17 |
Feels °C | 11 | 12 | 14 | 14 | 14 | 11 | 9 | 10 | 12 | 13 | 15 | 16 | 15 | 15 | 14 | 14 | 15 | 16 | 18 | 17 | 18 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 10 | WNW 9 | WNW 9 | W 9 | NW 8 | WNW 8 | WNW 8 | NW 8 | NW 8 | NW 7 | NW 7 | WNW 10 | WNW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NW 9 | WNW 9 |
| kJ | 33 | 18 | 17 | 8 | 6 | 3 | 6 | 6 | 2 | 2 | 2 | 2 | 10 | 10 | 24 | 23 | 22 | 21 | 20 | 20 | 15 |
Swell 2 Height (m) Direction Period (s) | — | — | — | NW 8 | NW 8 | W 9 | W 9 | W 9 | W 9 | W 9 | — | NW 11 | NW 7 | N 7 | N 7 | — | N 6 | — | — | — | NE 3 |
| kJ | — | — | — | 3 | 3 | 2 | 1 | 2 | 2 | 2 | — | 5 | 2 | 1 | 1 | — | 1 | — | — | — | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SE 5 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ESE 3 | E 4 | E 4 | E 3 | E 3 | ENE 3 | E 4 | E 5 | E 4 | E 4 | E 4 | ENE 4 | ENE 3 | E 4 | E 4 | E 4 | ENE 4 | ENE 4 | ENE 4 | ENE 3 | — |
| kJ | 3 | 9 | 7 | 3 | 2 | 3 | 22 | 34 | 25 | 16 | 7 | 4 | 2 | 7 | 11 | 7 | 5 | 5 | 2 | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 40 | 40 | 40 | 40 | 40 | 40 | 140 | 97 | 97 | 254 | 97 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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