Surf Forecasts:
How big are the waves at Castlerock today (23 Aug):
- Morning surf: Morning surf (23 Aug, local time) - 1ft (0.3m), 6s period with NW swell.
- Afternoon surf: Afternoon surf (23 Aug, local time) - 1.5ft (0.4m), 6s period with NW swell.
- Evening surf: Evening surf (23 Aug, local time) - 1.5ft (0.4m), 11s period with NW swell.
The current surf forecast for Castlerock at 1AM is: 0.1m 10s primary swell from a Northwest direction and 0.3m 4s secondary swell from a North-northwest direction, 0.1m 5s secondary swell from a Northwest direction (forecast issued at 06:00pm August 22). The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 Aug) | 1ft (0.3m) | 6s |
| Afternoon (23 Aug) | 1.5ft (0.4m) | 6s |
| Evening (23 Aug) | 1.5ft (0.4m) | 11s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 20°C on Mon afternoon, min 12°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Sat 22 | Sunday 23 | Monday 24 | |||||||||||||||||
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) | NNW 5 | NNW 5 | NW 4 | NNW 4 | NNW 5 | NNW 5 | NW 6 | NW 6 | NW 7 | NW 7 | NW 11 | NW 11 | NW 11 | NW 12 | NW 11 | NW 11 | NW 11 | NW 10 | NW 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 8 | 8 | 5 | 4 | 4 | 3 | 5 | 14 | 15 | 16 | 30 | 94 | 194 | 309 | 273 | 194 | 163 | 108 | 119 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross | on | on | cross-on | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 3:46PM1.16m | 4:16AM1.09m | 4:48PM1.29m | 4:59AM1.20m | 5:25PM1.44m | ||||||||||||||
Low Tide | 10:15PM0.72m | 10:18AM0.64m | 11:16PM0.61m | 11:10AM0.50m | |||||||||||||||
 | |  | | | | |  | | |  | | |  | | | | | | |
 | — | — | — | — | 6:13 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — |
 | — | 8:45 | — | — | — | — | — | — | — | 8:43 | — | — | — | — | — | — | — | 8:40 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 16 | 15 | 14 | 14 | 12 | 14 | 18 | 20 | 19 | 16 |
Feels °C | 11 | 10 | 12 | 12 | 12 | 12 | 13 | 14 | 13 | 15 | 13 | 11 | 11 | 9 | 12 | 16 | 17 | 17 | 14 |
Swell 1 Height (m) Direction Period (s) | W 7 | W 10 | NW 4 | NNW 4 | NNW 5 | NNW 5 | NW 6 | NW 6 | NW 7 | NW 7 | NW 7 | NW 11 | NW 11 | NW 12 | NW 11 | NW 11 | NW 11 | NW 10 | NW 11 |
| kJ | 1 | 2 | 4 | 3 | 2 | 3 | 5 | 14 | 15 | 16 | 16 | 94 | 194 | 309 | 273 | 194 | 163 | 108 | 119 |
Swell 2 Height (m) Direction Period (s) | W 10 | W 6 | NW 6 | NW 5 | NW 10 | NW 9 | NW 9 | NW 9 | WNW 9 | WNW 8 | NW 11 | NW 6 | — | — | — | — | — | — | — |
| kJ | 2 | 1 | 2 | 1 | 4 | 3 | 3 | 3 | 7 | 6 | 30 | 14 | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | W 10 | NW 10 | W 6 | NW 6 | W 6 | — | N 11 | NW 11 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 2 | 4 | 1 | 1 | 1 | — | 3 | 5 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 5 | NNW 5 | NW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | ESE 3 | ESE 4 | ESE 4 |
| kJ | 8 | 8 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 4 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 273 | 282 | 273 | 273 | 251 | 251 | 42 | 42 | 40 | 40 | 16 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||
Header Global | |||||||||||||||||||
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