Surf Forecasts:
How big are the waves at Castlerock today (09 Aug):
- Morning surf: Morning surf (09 Aug, local time) - 3ft (0.9m), 9s period with NW swell.
- Afternoon surf: Afternoon surf (09 Aug, local time) - 3ft (0.9m), 9s period with NW swell.
- Evening surf: Evening surf (09 Aug, local time) - 3ft (0.9m), 9s period with NW swell.
The current surf forecast for Castlerock at 9AM is: 0.9m 9s primary swell from a Northwest direction (forecast issued at 12:00am August 09). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (09 Aug) | 3ft (0.9m) | 9s |
| Afternoon (09 Aug) | 3ft (0.9m) | 9s |
| Evening (09 Aug) | 3ft (0.9m) | 9s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 10mm), heaviest on Sat night. Warm (max 21°C on Tue afternoon, min 11°C on Sun night). Wind will be generally light. | ||||||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | ||||||||||||||||||||||
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 10 | WNW 9 | WNW 9 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | 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 | NNW 8 | N 8 | W 13 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 148 | 113 | 113 | 131 | 154 | 141 | 118 | 115 | 112 | 100 | 80 | 64 | 63 | 52 | 64 | 42 | 45 | 24 | 14 | 13 | 8 | 7 | 5 | 3 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-on | cross-on | cross | cross | cross-on | cross | cross | cross-off | cross | cross-on | on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off |
High Tide | 3:46AM1.32m | 4:25PM1.45m | 4:54AM1.42m | 5:23PM1.67m | 5:45AM1.53m | 6:11PM1.87m | ||||||||||||||||||
Low Tide | 10:14AM0.50m | 11:03PM0.42m | 11:16AM0.35m | 00:03AM0.26m | 12:04PM0.20m | |||||||||||||||||||
 | |  | | |  |  |  | |  |  | | | | | | | |  | | | | | | |
 | — | 5:48 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:15 | — | — | — | — | — | — | — | 9:13 | — | — | — | — | — | — | — | 9:10 | — |
mm | — | — | 3 | 3 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 15 | 14 | 13 | 12 | 13 | 15 | 13 | 12 | 12 | 11 | 14 | 15 | 15 | 14 | 14 | 13 | 14 | 13 | 15 | 19 | 21 | 21 | 19 |
Feels °C | 15 | 12 | 12 | 12 | 10 | 10 | 11 | 10 | 10 | 10 | 9 | 12 | 13 | 13 | 13 | 13 | 11 | 11 | 9 | 11 | 16 | 18 | 19 | 17 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 9 | WNW 9 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NW 7 | WNW 7 | WNW 7 | NW 7 |
| kJ | 148 | 113 | 113 | 131 | 154 | 141 | 118 | 115 | 112 | 100 | 80 | 64 | 63 | 35 | 64 | 42 | 45 | 24 | 14 | 13 | 8 | 5 | 5 | 2 |
Swell 2 Height (m) Direction Period (s) | — | N 9 | — | — | — | — | — | — | — | — | N 12 | NNW 11 | N 10 | NNW 10 | NW 8 | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 | NNW 8 | NNW 8 | N 8 | N 8 |
| kJ | — | 2 | — | — | — | — | — | — | — | — | 11 | 23 | 51 | 52 | 16 | 15 | 14 | 14 | 14 | 8 | 6 | 7 | 5 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 10 | W 10 | — | W 9 | — | W 9 | W 13 | W 13 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | — | 2 | — | 2 | 3 | 3 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | ESE 3 | ESE 3 | ESE 4 | ESE 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 4 | 4 | 4 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 9 | 0 | 185 | 27 | 1174 | 1268 | 27 | 27 | 9 | 0 | 9 | 42 | 110 | 40 | 8 | 0 | 40 | 40 | 44 | 56 | 79 | 41 | 40 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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