Surf Forecasts:
How big are the waves at Castlerock today (30 Jul):
- Morning surf: Morning surf (30 Jul, local time) - 3.5ft (1.0m), 8s period with NW swell.
- Afternoon surf: Afternoon surf (30 Jul, local time) - 3.5ft (1.1m), 8s period with NW swell.
- Evening surf: Evening surf (30 Jul, local time) - 3ft (0.9m), 7s period with NW swell.
The current surf forecast for Castlerock at 6AM is: 0.6m 7s primary swell from a West-northwest direction and 0.4m 9s secondary swell from a North-northwest direction (forecast issued at 12:00am July 30). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Jul) | 3.5ft (1.0m) | 8s |
| Afternoon (30 Jul) | 3.5ft (1.1m) | 8s |
| Evening (30 Jul) | 3ft (0.9m) | 7s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Thu afternoon. Very mild (max 16°C on Sat morning, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | ||||||||||||||||||||||
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 | 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 | WNW 8 | WNW 7 | NW 8 | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 | NNW 6 | NNW 6 | WNW 7 | WNW 7 | NNW 8 | WNW 7 | WNW 7 | WNW 7 | NW 6 | NW 7 | NW 6 | NW 6 | NW 6 | NW 7 | NW 7 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 39 | 32 | 48 | 119 | 182 | 145 | 89 | 69 | 46 | 26 | 14 | 9 | 10 | 11 | 10 | 9 | 18 | 9 | 22 | 21 | 38 | 59 | 63 | 54 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross | cross | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross |
High Tide | 7:17AM1.54m | 7:47PM1.82m | 7:47AM1.57m | 8:17PM1.85m | 8:18AM1.57m | 8:48PM1.86m | ||||||||||||||||||
Low Tide | 1:50AM0.31m | 1:41PM0.12m | 2:20AM0.29m | 2:09PM0.09m | 2:49AM0.28m | 2:36PM0.10m | ||||||||||||||||||
 |  |  |  |  | |  | | |  | | |  | | | | | | | | | | | | |
 | — | 5:30 | — | — | — | — | — | — | — | 5:31 | — | — | — | — | — | — | — | 5:33 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:35 | — | — | — | — | — | — | — | 9:32 | — | — | — | — | — | — | — | 9:30 | — |
mm | — | — | — | — | — | — | 1 | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 12 | 12 | 14 | 15 | 15 | 15 | 13 | 11 | 11 | 11 | 14 | 14 | 15 | 15 | 13 | 12 | 11 | 11 | 14 | 16 | 16 | 15 | 13 |
Feels °C | 9 | 9 | 8 | 9 | 10 | 11 | 11 | 10 | 8 | 8 | 8 | 11 | 11 | 11 | 11 | 10 | 9 | 8 | 8 | 10 | 11 | 11 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | WNW 8 | WNW 7 | N 8 | — | NW 8 | NW 7 | NW 7 | NW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | NW 6 | NW 7 | NW 6 | N 7 | — | — | NW 7 |
| kJ | 39 | 32 | 48 | 5 | — | 145 | 89 | 69 | 46 | 26 | 14 | 7 | 6 | 10 | 10 | 9 | 18 | 8 | 22 | 21 | 1 | — | — | 54 |
Swell 2 Height (m) Direction Period (s) | NNW 9 | NNW 9 | NNW 8 | — | — | — | — | — | — | W 7 | WNW 7 | WNW 7 | WNW 7 | NNW 8 | NNW 8 | NNW 7 | NNW 6 | WNW 7 | NNW 6 | N 6 | — | — | — | — |
| kJ | 27 | 26 | 24 | — | — | — | — | — | — | 1 | 5 | 9 | 10 | 11 | 6 | 5 | 3 | 9 | 3 | 1 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | N 8 | — | — | N 8 | — | N 8 | N 8 | — | W 10 | N 7 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 5 | — | — | 1 | — | 1 | 1 | — | 2 | 1 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | NW 8 | NW 8 | — | — | — | — | — | — | — | — | — | WNW 2 | NW 4 | — | — | — | — | NW 6 | NW 6 | NW 7 | — |
| kJ | — | — | — | 119 | 182 | — | — | — | — | — | — | — | — | — | 1 | 2 | — | — | — | — | 38 | 59 | 63 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 187 | 54 | 398 | 398 | 433 | 9 | 0 | 14 | 42 | 42 | 150 | 150 | 442 | 1493 | 187 | 27 | 27 | 172 | 391 | 409 | 409 | 409 | 27 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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