Surf Forecasts:
How big are the waves at Castlerock today (12 Jul):
- Morning surf: Morning surf (12 Jul, local time) - 1.5ft (0.5m), 6s period with NNW swell.
- Afternoon surf: Afternoon surf (12 Jul, local time) - 1.5ft (0.4m), 5s period with NW swell.
- Evening surf: Evening surf (12 Jul, local time) - 1ft (0.3m), 5s period with NNW swell.
The current surf forecast for Castlerock at 11AM is: 0.4m 5s primary swell from a North-northwest direction and 0.2m 8s secondary swell from a West-northwest direction, 0.2m 3s secondary swell from a East direction (forecast issued at 06:00am July 12). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Jul) | 1.5ft (0.5m) | 6s |
| Afternoon (12 Jul) | 1.5ft (0.4m) | 5s |
| Evening (12 Jul) | 1ft (0.3m) | 5s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 22°C on Tue afternoon, min 13°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Sunday 12 | Monday 13 | Tuesday 14 | Wed 15 | |||||||||||||||||||||
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 | 1 AM | |
Swell Height Map |  |  |  |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | NW 8 | NNW 6 | NNW 6 | NNW 5 | NW 5 | NNW 5 | NNW 5 | WNW 7 | WNW 7 | NNW 5 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 10 | NW 9 | NW 9 | NW 9 | WNW 11 | NW 10 | WNW 10 | WNW 10 | ENE 4 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 17 | 17 | 17 | 11 | 7 | 6 | 6 | 5 | 5 | 3 | 7 | 6 | 6 | 6 | 6 | 9 | 14 | 15 | 13 | 12 | 26 | 10 | 10 | 4 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross-off | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-on | glassy | cross | cross | glassy | cross | cross | cross | cross | cross-on | cross-off |
High Tide | 4:53AM1.54m | 5:24PM1.62m | 5:48AM1.60m | 6:15PM1.79m | 6:38AM1.64m | 7:03PM1.94m | ||||||||||||||||||
Low Tide | 11:19AM0.32m | 11:54PM0.28m | 12:11PM0.22m | 00:52AM0.17m | 12:56PM0.12m | |||||||||||||||||||
 |  | |  | | | |  | | | | | | | | | | | | | | | | | |
 | 5:01 | — | — | — | — | — | — | — | 5:03 | — | — | — | — | — | — | — | 5:05 | — | — | — | — | — | — | 5:05 |
 | — | — | — | — | — | — | 10:01 | — | — | — | — | — | — | — | 10:00 | — | — | — | — | — | — | 9:59 | — | 9:58 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 16 | 19 | 21 | 21 | 19 | 17 | 15 | 14 | 15 | 17 | 18 | 19 | 18 | 15 | 13 | 13 | 15 | 19 | 21 | 22 | 21 | 18 |
Feels °C | 18 | 16 | 15 | 18 | 20 | 20 | 18 | 17 | 14 | 12 | 13 | 14 | 15 | 18 | 17 | 13 | 11 | 12 | 14 | 16 | 19 | 21 | 20 | 17 |
Swell 1 Height (m) Direction Period (s) | NNW 6 | NNW 6 | NNW 6 | NNW 5 | NW 5 | NNW 5 | NNW 5 | NNW 5 | ENE 4 | ENE 4 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 10 | NW 9 | ENE 4 | ENE 4 | WNW 9 | NW 10 | WNW 10 | WNW 10 | W 10 |
| kJ | 17 | 17 | 17 | 11 | 7 | 6 | 6 | 3 | 2 | 3 | 7 | 6 | 6 | 6 | 6 | 9 | 14 | 3 | 3 | 8 | 26 | 10 | 9 | 2 |
Swell 2 Height (m) Direction Period (s) | NW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 7 | WNW 7 | WNW 7 | NNW 5 | NNW 5 | NW 5 | NW 5 | W 14 | W 14 | NW 10 | NW 7 | NW 13 | NW 9 | NW 9 | WNW 11 | — | — | WNW 10 | NW 7 |
| kJ | 17 | 13 | 12 | 6 | 6 | 5 | 5 | 5 | 3 | 3 | 1 | 1 | 4 | 4 | 4 | 2 | 7 | 14 | 13 | 12 | — | — | 10 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | WNW 7 | NW 7 | — | — | — | — | NW 13 | NW 12 | — | WNW 12 | WNW 11 | — | — | — | W 18 | — |
| kJ | — | — | — | — | — | — | — | — | 5 | 2 | — | — | — | — | 6 | 6 | — | 15 | 13 | — | — | — | 6 | — |
Wind waves Height (m) Direction Period (s) | — | — | E 3 | ENE 3 | ENE 3 | ENE 3 | ENE 3 | ENE 3 | — | — | ENE 4 | ENE 4 | ENE 3 | ENE 3 | ENE 3 | ENE 3 | ENE 3 | — | — | ENE 4 | ENE 3 | ENE 3 | ENE 3 | ENE 4 |
| kJ | — | — | 1 | 2 | 2 | 1 | 1 | 2 | — | — | 2 | 2 | 2 | 1 | 1 | 1 | 1 | — | — | 2 | 2 | 2 | 2 | 4 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 16 | 16 | 40 | 40 | 97 | 40 | 328 | 328 | 328 | 334 | 336 | 254 | 251 | 97 | 40 | 40 | 40 | 40 | 40 | 40 | 63 | 40 | 40 | 40 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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