Surf Forecasts:
How big are the waves at Castlerock today (02 Sep):
- Morning surf: Morning surf (02 Sep, local time) - 1.5ft (0.4m), 8s period with WNW swell.
- Afternoon surf: Afternoon surf (02 Sep, local time) - 1.5ft (0.5m), 9s period with NNW swell.
- Evening surf: Evening surf (02 Sep, local time) - 1.5ft (0.5m), 8s period with NNW swell.
The current surf forecast for Castlerock at 4PM is: 0.5m 9s primary swell from a North-northwest direction and 0.3m 8s secondary swell from a West-northwest direction (forecast issued at 12:00pm September 02). The wind direction is predicted to be offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (02 Sep) | 1.5ft (0.4m) | 8s |
| Afternoon (02 Sep) | 1.5ft (0.5m) | 9s |
| Evening (02 Sep) | 1.5ft (0.5m) | 8s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 5mm), mostly falling on Wed morning. Very mild (max 18°C on Wed afternoon, min 11°C on Fri night). Winds increasing (light winds from the SE on Wed morning, strong winds from the WSW by Fri morning). | |||||||||||||||||||||
Wed 2 | Thursday 3 | Friday 4 | |||||||||||||||||||
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 8 | NW 7 | NNW 9 | NNW 8 | NNW 8 | W 7 | WNW 7 | WNW 7 | NW 7 | NW 6 | NW 6 | WNW 6 | WNW 9 | WNW 11 | WNW 11 | NW 12 | NW 13 | WNW 13 | WNW 12 | NW 13 | NW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 25 | 16 | 42 | 39 | 38 | 26 | 20 | 32 | 22 | 16 | 16 | 15 | 96 | 183 | 393 | 948 | 1391 | 1720 | 1236 | 1230 | 1137 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross |
High Tide | 9:39AM1.55m | 10:03PM1.61m | 10:22AM1.44m | 10:51PM1.42m | 11:21AM1.31m | ||||||||||||||||
Low Tide | 3:42PM0.28m | 4:16AM0.41m | 4:29PM0.43m | 5:07AM0.54m | 5:44PM0.59m | ||||||||||||||||
 |  | | |  | |  |  | | | | | | |  |  | |  | | | | |
 | 6:33 | — | — | — | — | — | 6:35 | — | — | — | — | — | — | — | 6:37 | — | — | — | — | — | — |
 | — | — | — | 8:17 | — | — | — | — | — | — | — | 8:15 | — | — | — | — | — | — | — | 8:13 | — |
mm | — | 1 | 1 | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | 1 | — | — | — |
Temp °C | 14 | 15 | 16 | 18 | 17 | 16 | 15 | 13 | 16 | 17 | 15 | 15 | 15 | 13 | 13 | 13 | 14 | 15 | 16 | 14 | 13 |
Feels °C | 12 | 14 | 15 | 17 | 15 | 12 | 12 | 10 | 13 | 14 | 10 | 11 | 11 | 8 | 7 | 6 | 7 | 8 | 9 | 7 | 7 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | NW 7 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | WNW 7 | WNW 7 | NW 7 | NW 6 | NW 6 | WNW 6 | WNW 9 | WNW 11 | WNW 11 | NW 12 | NW 13 | — | — | — | NW 12 |
| kJ | 25 | 11 | 42 | 39 | 38 | 24 | 20 | 32 | 22 | 16 | 16 | 15 | 96 | 183 | 393 | 948 | 1391 | — | — | — | 1137 |
Swell 2 Height (m) Direction Period (s) | NW 7 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | — | NNW 9 | NNW 9 | NNW 9 | NNW 9 | NNW 9 | N 9 | N 9 | N 8 | N 8 | N 8 | — | — | — | — | — |
| kJ | 11 | 12 | 12 | 11 | 6 | — | 16 | 17 | 17 | 8 | 8 | 6 | 2 | 1 | 1 | 1 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | NNW 9 | NW 7 | ESE 3 | — | — | — | — | — | — | — | WNW 10 | — | — | — | — | — | — | — | — | — |
| kJ | — | 16 | 2 | 1 | — | — | — | — | — | — | — | 10 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | W 7 | W 3 | WSW 2 | — | — | SW 2 | SW 3 | SW 3 | SW 3 | SW 3 | WSW 3 | W 4 | WNW 13 | WNW 12 | NW 13 | — |
| kJ | — | — | — | — | — | 26 | 3 | 1 | — | — | 2 | 4 | 3 | 2 | 3 | 6 | 19 | 1720 | 1236 | 1230 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 16 | 8 | 8 | 27 | 187 | 187 | 42 | 42 | 341 | 44 | 54 | 9 | 331 | 300 | 380 | 1006 | 780 | 380 | 587 | 364 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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