Surf Forecasts:
How big are the waves at Castlerock today (26 Jul):
- Morning surf: Morning surf (26 Jul, local time) - 6ft (1.8m), 10s period with NW swell.
- Afternoon surf: Afternoon surf (26 Jul, local time) - 6ft (1.8m), 10s period with NW swell.
- Evening surf: Evening surf (26 Jul, local time) - 5ft (1.5m), 10s period with NW swell.
The current surf forecast for Castlerock at 10AM is: 1.8m 10s primary swell from a Northwest direction (forecast issued at 06:00am July 26). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (26 Jul) | 6ft (1.8m) | 10s |
| Afternoon (26 Jul) | 6ft (1.8m) | 10s |
| Evening (26 Jul) | 5ft (1.5m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 11mm), heaviest on Mon night. Very mild (max 18°C on Mon night, min 13°C on Sun night). Winds decreasing (fresh winds from the WNW on Sun afternoon, calm by Tue night). | |||||||||||||||||||||||
Sunday 26 | Monday 27 | Tuesday 28 | |||||||||||||||||||||
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 | 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 10 | NW 9 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 570 | 622 | 614 | 589 | 546 | 509 | 442 | 362 | 335 | 260 | 200 | 196 | 192 | 139 | 110 | 90 | 86 | 73 | 70 | 68 | 86 | 67 | 68 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | glassy |
High Tide | 5:09AM1.26m | 5:36PM1.44m | 5:46AM1.34m | 6:12PM1.55m | 6:18AM1.42m | 6:45PM1.66m | |||||||||||||||||
Low Tide | 11:26AM0.49m | 00:07AM0.49m | 12:07PM0.38m | 00:44AM0.41m | 12:41PM0.27m | ||||||||||||||||||
 |  | | |  | |  |  |  |  | | | | | | | |  |  | | | |  | |
 | 5:22 | — | — | — | — | — | — | — | 5:24 | — | — | — | — | — | — | — | 5:26 | — | — | — | — | — | — |
 | — | — | — | — | — | 9:42 | — | — | — | — | — | — | — | 9:39 | — | — | — | — | — | — | — | 9:38 | — |
mm | 1 | — | — | — | — | — | 1 | — | — | — | — | — | — | — | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | — |
Temp °C | 14 | 14 | 14 | 14 | 15 | 15 | 14 | 13 | 13 | 14 | 14 | 15 | 16 | 17 | 16 | 16 | 17 | 18 | 18 | 18 | 17 | 18 | 18 |
Feels °C | 8 | 8 | 8 | 8 | 9 | 10 | 10 | 9 | 9 | 11 | 12 | 14 | 15 | 16 | 16 | 15 | 16 | 16 | 15 | 15 | 17 | 18 | 19 |
Swell 1 Height (m) Direction Period (s) | — | — | — | — | — | — | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 |
| kJ | — | — | — | — | — | — | 442 | 362 | 335 | 260 | 200 | 196 | 192 | 139 | 110 | 90 | 86 | 73 | 70 | 68 | 86 | 67 | 68 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | N 9 | N 9 | N 10 | N 10 | N 10 | N 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | NNW 9 | N 9 | N 9 | N 9 | N 9 |
| kJ | — | — | — | — | — | — | — | 6 | 6 | 7 | 17 | 17 | 17 | 19 | 19 | 17 | 16 | 16 | 16 | 6 | 6 | 6 | 6 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 10 | NW 10 | NW 10 | NW 9 | NW 10 | NW 10 | — | — | — | — | — | — | — | — | — | — | — | — | WSW 2 | WSW 3 | — | — | — |
| kJ | 570 | 622 | 614 | 589 | 546 | 509 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 3 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 398 | 334 | 334 | 443 | 938 | 398 | 387 | 387 | 54 | 9 | 0 | 0 | 0 | 9 | 0 | 0 | 0 | 0 | 9 | 9 | 0 | 0 | 0 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||||
Header Global | |||||||||||||||||||||||
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