Surf Forecasts:
How big are the waves at Castlerock today (29 Aug):
- Afternoon surf: Afternoon surf (29 Aug, local time) - 1.5ft (0.4m), 6s period with NNW swell.
- Evening surf: Evening surf (29 Aug, local time) - 1.5ft (0.4m), 6s period with NNW swell.
The current surf forecast for Castlerock at 9PM is: 0.4m 6s primary swell from a North-northwest direction and 0.1m 7s secondary swell from a Northwest direction (forecast issued at 06:00pm August 29). The wind direction is predicted to be glassy.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (29 Aug) | - | - |
| Afternoon (29 Aug) | 1.5ft (0.4m) | 6s |
| Evening (29 Aug) | 1.5ft (0.4m) | 6s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 14mm), heaviest on Tue morning. Very mild (max 16°C on Sat afternoon, min 12°C on Mon night). Winds increasing (calm on Sat night, fresh winds from the WNW by Sun night). | |||||||||||||||||||
Sat 29 | Sunday 30 | Monday 31 | |||||||||||||||||
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 6 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | W 9 | NNW 6 | WNW 4 | WNW 5 | WNW 8 | NW 8 | NW 8 | NW 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 17 | 17 | 17 | 16 | 8 | 7 | 8 | 8 | 8 | 4 | 3 | 6 | 4 | 21 | 78 | 219 | 187 | 131 | 75 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | off | off | cross-off | cross-off | off | cross-off | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross | cross-off | cross-off |
High Tide | 7:47PM1.96m | 7:55AM1.69m | 8:18PM1.95m | 8:27AM1.68m | 8:50PM1.89m | ||||||||||||||
Low Tide | 1:39PM0.03m | 2:16AM0.15m | 2:06PM0.03m | 2:42AM0.17m | 2:34PM0.08m | ||||||||||||||
 |  |  | | | | |  | |  | |  | | | | | | | | |
 | — | — | — | — | 6:28 | — | — | — | — | — | — | — | 6:30 | — | — | — | — | — | — |
 | — | 8:28 | — | — | — | — | — | — | — | 8:25 | — | — | — | — | — | — | — | 8:22 | — |
mm | — | 1 | 2 | 1 | 1 | — | — | — | 1 | 1 | 1 | — | — | 1 | — | — | — | — | — |
Temp °C | 16 | 15 | 15 | 14 | 14 | 14 | 14 | 15 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 14 | 15 | 14 | 14 |
Feels °C | 16 | 15 | 16 | 14 | 14 | 13 | 12 | 13 | 16 | 15 | 14 | 12 | 12 | 7 | 7 | 8 | 11 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | NNW 6 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | N 6 | W 11 | — | NW 8 | NW 8 | NW 7 |
| kJ | 17 | 17 | 17 | 16 | 8 | 7 | 8 | 8 | 8 | 4 | 3 | 3 | 4 | 1 | 2 | — | 187 | 131 | 75 |
Swell 2 Height (m) Direction Period (s) | — | — | NW 7 | — | — | NW 6 | W 8 | W 11 | W 10 | W 10 | W 9 | W 9 | W 9 | W 11 | — | — | — | W 10 | W 10 |
| kJ | — | — | 2 | — | — | 2 | 1 | 2 | 2 | 2 | 2 | 6 | 2 | 2 | — | — | — | 2 | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 9 | W 9 | W 8 | — | W 8 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 2 | 2 | 1 | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | ESE 2 | — | — | WNW 2 | WNW 4 | WNW 5 | WNW 8 | — | SW 3 | SW 3 |
| kJ | — | — | — | — | — | — | — | — | — | 1 | — | — | 1 | 21 | 78 | 219 | — | 1 | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 42 | 339 | 300 | 254 | 109 | 79 | 40 | 40 | 40 | 63 | 63 | 42 | 157 | 323 | 398 | 387 | 187 | 9 | 9 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||
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