Surf Forecasts:
How big are the waves at Castlerock today (25 Jul):
- Morning surf: Morning surf (25 Jul, local time) - 6ft (1.9m), 10s period with NW swell.
- Afternoon surf: Afternoon surf (25 Jul, local time) - 6ft (1.9m), 11s period with NW swell.
- Evening surf: Evening surf (25 Jul, local time) - 5ft (1.6m), 11s period with NW swell.
The current surf forecast for Castlerock at 8PM is: 1.7m 11s primary swell from a Northwest direction (forecast issued at 12:00pm July 25). The wind direction is predicted to be cross-offshore and the swell rating is 3.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (25 Jul) | 6ft (1.9m) | 10s |
| Afternoon (25 Jul) | 6ft (1.9m) | 11s |
| Evening (25 Jul) | 5ft (1.6m) | 11s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 8mm), mostly falling on Sat morning. Very mild (max 16°C on Sat afternoon, min 13°C on Sun night). Winds decreasing (fresh winds from the WNW on Sun afternoon, light winds from the S by Mon night). | |||||||||||||||||||||
Sat 25 | Sunday 26 | Monday 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) | NW 10 | NW 10 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 804 | 789 | 763 | 703 | 595 | 441 | 517 | 538 | 585 | 573 | 585 | 597 | 678 | 433 | 404 | 328 | 255 | 192 | 192 | 139 | 134 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross | off | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 4:53PM1.32m | 5:09AM1.26m | 5:36PM1.44m | 5:46AM1.34m | 6:12PM1.55m | ||||||||||||||||
Low Tide | 10:33AM0.59m | 11:22PM0.58m | 11:26AM0.49m | 00:07AM0.49m | 12:07PM0.38m | ||||||||||||||||
 |  | |  |  | | | | | | |  |  | | | | | | | | | |
 | 5:20 | — | — | — | — | — | 5:22 | — | — | — | — | — | — | — | 5:24 | — | — | — | — | — | — |
 | — | — | — | 9:44 | — | — | — | — | — | — | — | 9:42 | — | — | — | — | — | — | — | 9:39 | — |
mm | 1 | — | — | — | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 |
Temp °C | 15 | 15 | 16 | 16 | 15 | 15 | 14 | 14 | 14 | 14 | 15 | 15 | 14 | 13 | 14 | 14 | 15 | 15 | 15 | 16 | 16 |
Feels °C | 11 | 12 | 13 | 14 | 14 | 11 | 9 | 9 | 8 | 8 | 9 | 9 | 9 | 8 | 10 | 11 | 12 | 13 | 14 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | NW 10 | NW 10 | NW 11 | NW 11 | NW 11 | NW 11 | — | — | — | — | — | — | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 |
| kJ | 804 | 789 | 763 | 703 | 595 | 441 | — | — | — | — | — | — | 509 | 433 | 404 | 328 | 255 | 192 | 192 | 139 | 134 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | N 9 | N 10 | N 10 | N 10 | N 10 | N 10 | N 10 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 7 | 7 | 16 | 16 | 16 | 16 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | W 2 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 1 | 517 | 538 | 585 | 573 | 585 | 597 | 678 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 387 | 387 | 387 | 162 | 0 | 84 | 382 | 334 | 334 | 334 | 334 | 413 | 334 | 336 | 54 | 54 | 27 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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