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) - 4ft (1.2m), 8s period with NW swell.
- Evening surf: Evening surf (30 Jul, local time) - 3.5ft (1.0m), 7s period with NW swell.
The current surf forecast for Castlerock at 7PM is: 1.1m 7s primary swell from a Northwest direction (forecast issued at 12:00pm July 30). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Jul) | 3.5ft (1.0m) | 8s |
| Afternoon (30 Jul) | 4ft (1.2m) | 8s |
| Evening (30 Jul) | 3.5ft (1.0m) | 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 afternoon, min 10°C on Thu night). Wind will be generally light. | |||||||||||||||||||||
Thu 30 | Friday 31 | Saturday 1 | |||||||||||||||||||
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 8 | NW 8 | NW 8 | NW 7 | NNW 7 | NNW 7 | NNW 6 | NNW 6 | NW 6 | WNW 7 | NW 6 | WNW 7 | WNW 7 | WNW 7 | NW 7 | NW 7 | WNW 6 | WNW 6 | NW 6 | NW 7 | NW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 120 | 182 | 149 | 121 | 90 | 61 | 28 | 22 | 9 | 17 | 12 | 19 | 31 | 30 | 21 | 22 | 24 | 49 | 70 | 63 | 54 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross | cross-on | 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 | 1:41PM0.12m | 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 | 14 | 15 | 15 | 15 | 13 | 11 | 10 | 11 | 13 | 15 | 15 | 15 | 13 | 11 | 11 | 12 | 14 | 15 | 16 | 15 | 13 |
Feels °C | 9 | 9 | 10 | 12 | 12 | 8 | 7 | 8 | 10 | 11 | 11 | 11 | 10 | 8 | 8 | 9 | 10 | 10 | 11 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | NW 8 | — | — | NW 7 | NNW 7 | NNW 7 | NNW 6 | NNW 6 | NW 6 | NNW 6 | WNW 7 | NNW 5 | WNW 7 | WNW 7 | NW 7 | NW 7 | WNW 6 | N 7 | — | NW 7 | NW 7 |
| kJ | 120 | — | — | 121 | 90 | 61 | 28 | 22 | 9 | 7 | 10 | 6 | 31 | 30 | 21 | 22 | 24 | 1 | — | 63 | 54 |
Swell 2 Height (m) Direction Period (s) | N 8 | — | — | — | — | — | W 7 | W 7 | WNW 7 | N 8 | N 8 | N 8 | NNW 6 | N 8 | N 8 | N 7 | NW 8 | — | — | — | — |
| kJ | 1 | — | — | — | — | — | 4 | 4 | 5 | 1 | 1 | 1 | 3 | 1 | 1 | 1 | 2 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | N 8 | N 8 | — | — | N 8 | NW 5 | — | W 10 | N 7 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 5 | 1 | — | — | 1 | 1 | — | 2 | 1 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 2 | NW 8 | NW 8 | — | — | — | — | — | — | WNW 7 | NW 6 | WNW 7 | — | — | — | — | — | WNW 6 | NW 6 | — | — |
| kJ | 1 | 182 | 149 | — | — | — | — | — | — | 17 | 12 | 19 | — | — | — | — | — | 49 | 70 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 400 | 414 | 500 | 772 | 9 | 0 | 42 | 42 | 54 | 2400 | 2375 | 873 | 187 | 172 | 27 | 27 | 391 | 409 | 409 | 409 | 27 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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