Surf Forecasts:
How big are the waves at Castlerock today (10 Aug):
- Morning surf: Morning surf (10 Aug, local time) - 2.5ft (0.7m), 8s period with NW swell.
- Afternoon surf: Afternoon surf (10 Aug, local time) - 2ft (0.6m), 10s period with NNW swell.
- Evening surf: Evening surf (10 Aug, local time) - 1.5ft (0.5m), 9s period with NNW swell.
The current surf forecast for Castlerock at 7AM is: 0.7m 8s primary swell from a Northwest direction and 0.1m 12s secondary swell from a North direction (forecast issued at 12:00am August 10). The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (10 Aug) | 2.5ft (0.7m) | 8s |
| Afternoon (10 Aug) | 2ft (0.6m) | 10s |
| Evening (10 Aug) | 1.5ft (0.5m) | 9s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastSome drizzle, heaviest during Wed afternoon. Warm (max 24°C on Wed afternoon, min 12°C on Sun night). Wind will be generally light. | ||||||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | ||||||||||||||||||||||
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) | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NW 7 | NNW 8 | NW 7 | NW 7 | NNW 8 | W 13 | W 12 | W 11 | W 11 | W 11 | W 11 | W 10 | W 12 | W 12 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 109 | 84 | 66 | 64 | 61 | 72 | 65 | 43 | 26 | 24 | 15 | 13 | 8 | 8 | 6 | 3 | 11 | 10 | 9 | 2 | 2 | 2 | 3 | 3 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross-on | on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | off | off | off |
High Tide | 4:54AM1.42m | 5:23PM1.67m | 5:45AM1.53m | 6:11PM1.87m | 6:29AM1.60m | 6:54PM2.02m | ||||||||||||||||||
Low Tide | 11:03PM0.42m | 11:16AM0.35m | 00:03AM0.26m | 12:04PM0.20m | 00:51AM0.14m | 12:44PM0.06m | ||||||||||||||||||
 |  |  |  | | | |  | | | |  | | | | | | | | | | |  |  | |
 | — | 5:50 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:13 | — | — | — | — | — | — | — | 9:10 | — | — | — | — | — | — | — | 9:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 |
Temp °C | 12 | 12 | 12 | 14 | 15 | 15 | 14 | 14 | 13 | 13 | 13 | 15 | 18 | 21 | 21 | 19 | 18 | 18 | 17 | 19 | 21 | 24 | 24 | 22 |
Feels °C | 9 | 10 | 10 | 12 | 13 | 13 | 13 | 13 | 11 | 10 | 10 | 12 | 15 | 18 | 19 | 16 | 15 | 15 | 15 | 17 | 20 | 24 | 24 | 22 |
Swell 1 Height (m) Direction Period (s) | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NNW 9 | NW 7 | NW 7 | NW 7 | WNW 7 | NW 7 | E 4 | W 11 | W 11 | W 11 | W 11 | W 10 | ESE 3 | ESE 4 |
| kJ | 109 | 84 | 66 | 64 | 61 | 72 | 65 | 43 | 26 | 24 | 15 | 8 | 8 | 8 | 5 | 2 | 1 | 10 | 9 | 2 | 2 | 2 | 1 | 1 |
Swell 2 Height (m) Direction Period (s) | — | — | N 12 | NNW 11 | N 10 | WNW 8 | WNW 8 | NW 8 | NW 8 | NW 7 | NW 7 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | N 8 | NW 7 | E 3 | — | — | N 6 | — | W 10 | W 12 |
| kJ | — | — | 3 | 23 | 51 | 23 | 24 | 14 | 14 | 14 | 14 | 13 | 6 | 6 | 6 | 1 | 2 | 1 | — | — | 1 | — | 2 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 10 | W 10 | — | — | W 9 | W 9 | W 13 | W 13 | W 12 | NW 7 | NW 6 | NW 6 | N 7 | — | W 12 | E 5 |
| kJ | — | — | — | — | — | — | — | — | 2 | 2 | — | — | 2 | 2 | 3 | 3 | 11 | 2 | 2 | 2 | 1 | — | 3 | 1 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | ESE 2 | ESE 3 | ESE 3 | ESE 3 | — | — | — | SSE 2 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 2 | 1 | — | — | — | 1 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 27 | 9 | 0 | 9 | 42 | 118 | 42 | 8 | 14 | 40 | 40 | 41 | 56 | 79 | 41 | 40 | 40 | 40 | 40 | 40 | 42 | 42 | 40 | 40 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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