Surf Forecasts:
How big are the waves at Castlerock today (30 Aug):
- Morning surf: Morning surf (30 Aug, local time) - 1ft (0.3m), 6s period with NNW swell.
- Afternoon surf: Afternoon surf (30 Aug, local time) - 1ft (0.3m), 6s period with NNW swell.
- Evening surf: Evening surf (30 Aug, local time) - 0.5ft (0.2m), 6s period with NNW swell.
The current surf forecast for Castlerock at 11AM is: 0.3m 6s primary swell from a North-northwest direction and 0.1m 8s secondary swell from a West direction (forecast issued at 06:00am August 30). The wind direction is predicted to be offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Aug) | 1ft (0.3m) | 6s |
| Afternoon (30 Aug) | 1ft (0.3m) | 6s |
| Evening (30 Aug) | 0.5ft (0.2m) | 6s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 27mm), heaviest during Tue night. Very mild (max 16°C on Sun afternoon, min 13°C on Sun night). Winds decreasing (fresh winds from the WNW on Sun night, calm by Tue night). | |||||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | |||||||||||||||||||||
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) | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | W 9 | WNW 3 | WNW 4 | WNW 6 | NW 9 | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 | WNW 8 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 8 | 7 | 8 | 8 | 8 | 4 | 3 | 6 | 3 | 15 | 118 | 316 | 216 | 135 | 75 | 45 | 36 | 35 | 99 | 145 | 145 | 70 | 67 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | on | cross-on | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | glassy |
High Tide | 7:55AM1.69m | 8:18PM1.95m | 8:27AM1.68m | 8:50PM1.89m | 9:01AM1.64m | 9:24PM1.77m | |||||||||||||||||
Low Tide | 2:16AM0.15m | 2:06PM0.03m | 2:42AM0.17m | 2:34PM0.08m | 3:10AM0.21m | 3:05PM0.16m | |||||||||||||||||
 |  |  |  | |  |  | |  | | | | | | | | | | | | | | | |
 | 6:28 | — | — | — | — | — | — | — | 6:30 | — | — | — | — | — | — | — | 6:31 | — | — | — | — | — | — |
 | — | — | — | — | — | 8:25 | — | — | — | — | — | — | — | 8:22 | — | — | — | — | — | — | — | 8:21 | — |
mm | 1 | 1 | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 5 | 2 | — |
Temp °C | 14 | 14 | 15 | 15 | 16 | 15 | 14 | 14 | 13 | 13 | 14 | 15 | 15 | 15 | 13 | 13 | 14 | 15 | 15 | 16 | 15 | 14 | 13 |
Feels °C | 14 | 14 | 14 | 14 | 16 | 15 | 12 | 12 | 8 | 6 | 8 | 9 | 11 | 11 | 10 | 9 | 10 | 11 | 10 | 12 | 14 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NW 6 | W 11 | — | — | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 | WNW 8 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 |
| kJ | 8 | 7 | 8 | 8 | 8 | 4 | 3 | 3 | 1 | 2 | — | — | 216 | 135 | 75 | 45 | 36 | 35 | 99 | 145 | 145 | 70 | 67 |
Swell 2 Height (m) Direction Period (s) | — | NW 6 | W 8 | W 11 | W 10 | W 10 | W 9 | W 9 | W 9 | N 6 | — | — | — | W 10 | W 10 | W 9 | WNW 9 | NW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 5 | NNW 6 |
| kJ | — | 2 | 1 | 2 | 2 | 2 | 2 | 6 | 2 | 1 | — | — | — | 2 | 2 | 7 | 8 | 10 | 4 | 4 | 3 | 9 | 12 |
Swell 3 Height (m) Direction Period (s) | W 9 | W 8 | — | W 8 | — | — | W 12 | N 6 | W 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | 1 | — | 1 | — | — | 3 | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | WNW 3 | WNW 4 | WNW 6 | NW 9 | — | — | — | SW 2 | SW 2 | SW 3 | SW 3 | WSW 3 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 3 | 15 | 118 | 316 | — | — | — | 1 | 1 | 4 | 5 | 3 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 109 | 79 | 40 | 40 | 40 | 63 | 66 | 144 | 336 | 350 | 380 | 387 | 300 | 9 | 9 | 187 | 187 | 187 | 384 | 409 | 9 | 42 | 0 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||||
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