Surf Forecasts:
How big are the waves at Castlerock today (09 Oct):
- Afternoon surf: Afternoon surf (09 Oct, local time) - 3.5ft (1.1m), 11s period with NW swell.
- Evening surf: Evening surf (09 Oct, local time) - 3ft (0.9m), 10s period with NW swell.
The current surf forecast for Castlerock at 12AM is: 0.9m 10s primary swell from a West-northwest direction and 0.4m 3s secondary swell from a West direction (forecast issued at 06:00pm October 08). An open ocean swell of 0.1m 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 (09 Oct) | - | - |
| Afternoon (09 Oct) | 3.5ft (1.1m) | 11s |
| Evening (09 Oct) | 3ft (0.9m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 27mm), heaviest during Thu afternoon. Very mild (max 15°C on Thu night, min 9°C on Thu afternoon). Winds decreasing (strong winds from the W on Fri night, light winds from the SSW by Sun morning). | |||||||||||||||||||
Thu 8 | Friday 9 | Saturday 10 | |||||||||||||||||
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) | NW 11 | NW 11 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 11 | NW 12 | NW 12 | NW 13 | NW 13 | NW 13 | NW 13 | NW 13 | NW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 220 | 159 | 161 | 161 | 196 | 495 | 422 | 512 | 629 | 735 | 1439 | 2375 | 3010 | 3751 | 4584 | 4418 | 3932 | 3038 | 2475 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross-off | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 5:37PM1.91m | 5:53AM1.59m | 6:11PM1.96m | 6:26AM1.68m | 6:43PM1.95m | ||||||||||||||
Low Tide | 00:13AM0.13m | 12:02PM0.08m | 00:42AM0.08m | 12:36PM0.04m | |||||||||||||||
 |  | | | |  |  |  | |  | | | | | |  | |  |  | |
 | — | — | — | — | — | 7:43 | — | — | — | — | — | — | — | 7:45 | — | — | — | — | — |
 | 6:45 | — | — | — | — | — | — | — | 6:44 | — | — | — | — | — | — | — | 6:40 | — | — |
mm | 6 | 4 | 2 | 5 | 2 | 2 | — | 1 | 1 | — | 1 | 1 | — | 1 | 1 | — | — | — | — |
Temp °C | 9 | 12 | 14 | 14 | 15 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 11 | 11 | 11 | 11 | 10 |
Feels °C | 4 | 6 | 10 | 11 | 10 | 6 | 5 | 3 | 3 | 2 | 1 | 1 | -1 | -1 | 1 | 1 | 2 | 3 | 3 |
Swell 1 Height (m) Direction Period (s) | NW 11 | NW 11 | WNW 10 | WNW 10 | WNW 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 12 |
| kJ | 220 | 159 | 161 | 161 | 196 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2475 |
Swell 2 Height (m) Direction Period (s) | — | ESE 3 | SE 4 | SE 4 | W 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 1 | 2 | 1 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 2 | S 3 | W 3 | W 3 | W 3 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 11 | NW 12 | NW 12 | NW 13 | NW 13 | NW 13 | NW 13 | NW 13 | — |
| kJ | 2 | 2 | 1 | 5 | 5 | 495 | 422 | 512 | 629 | 735 | 1439 | 2375 | 3010 | 3751 | 4584 | 4418 | 3932 | 3038 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 305 | 323 | 150 | 9 | 323 | 339 | 378 | 1034 | 1174 | 794 | 772 | 794 | 834 | 772 | 772 | 772 | 772 | 387 | 382 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||
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