Surf Forecasts:
How big are the waves at Castlerock today (02 Sep):
- Morning surf: Morning surf (02 Sep, local time) - 1.5ft (0.4m), 8s period with WNW swell.
- Afternoon surf: Afternoon surf (02 Sep, local time) - 1.5ft (0.5m), 9s period with NNW swell.
- Evening surf: Evening surf (02 Sep, local time) - 1.5ft (0.5m), 8s period with NNW swell.
The current surf forecast for Castlerock at 3AM is: 0.6m 8s primary swell from a Northwest direction (forecast issued at 12:00am September 02). The wind direction is predicted to be offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (02 Sep) | 1.5ft (0.4m) | 8s |
| Afternoon (02 Sep) | 1.5ft (0.5m) | 9s |
| Evening (02 Sep) | 1.5ft (0.5m) | 8s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 10mm), heaviest on Wed morning. Very mild (max 18°C on Wed afternoon, min 13°C on Thu night). Winds increasing (calm on Tue night, strong winds from the W by Fri morning). | ||||||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||||||||||
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 8 | NW 8 | NW 8 | WNW 8 | NW 7 | NNW 9 | NNW 8 | NNW 8 | W 7 | WNW 7 | WNW 7 | NW 7 | NW 7 | WNW 6 | WNW 10 | WNW 11 | WNW 11 | WNW 12 | NW 12 | WNW 13 | WNW 13 | NW 13 | NW 13 | WNW 12 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 51 | 53 | 50 | 25 | 16 | 42 | 39 | 38 | 27 | 20 | 27 | 23 | 21 | 13 | 22 | 176 | 238 | 456 | 892 | 1572 | 2385 | 2452 | 2239 | 2165 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross |
High Tide | 9:39AM1.55m | 10:03PM1.61m | 10:22AM1.44m | 10:51PM1.42m | 11:21AM1.31m | |||||||||||||||||||
Low Tide | 3:40AM0.30m | 3:42PM0.28m | 4:16AM0.41m | 4:29PM0.43m | 5:07AM0.54m | 5:44PM0.59m | ||||||||||||||||||
 |  |  |  | |  | | | |  |  | | | | | | |  | | |  | | | | |
 | — | 6:33 | — | — | — | — | — | — | — | 6:35 | — | — | — | — | — | — | — | 6:37 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:17 | — | — | — | — | — | — | — | 8:15 | — | — | — | — | — | — | — | 8:13 | — |
mm | 1 | — | 1 | — | 2 | 1 | — | 1 | 1 | — | — | — | 1 | — | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 14 | 14 | 15 | 15 | 15 | 18 | 17 | 16 | 15 | 14 | 16 | 17 | 17 | 14 | 14 | 13 | 13 | 13 | 14 | 15 | 15 | 14 | 13 |
Feels °C | 15 | 14 | 13 | 12 | 13 | 14 | 17 | 15 | 13 | 12 | 12 | 13 | 13 | 12 | 10 | 10 | 8 | 7 | 5 | 6 | 8 | 7 | 7 | 7 |
Swell 1 Height (m) Direction Period (s) | NW 8 | NW 8 | NW 8 | WNW 8 | NW 7 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | WNW 7 | WNW 7 | NW 7 | NW 7 | WNW 6 | WNW 7 | WNW 11 | WNW 11 | WNW 12 | NW 12 | WNW 13 | — | — | — | NW 12 |
| kJ | 51 | 53 | 50 | 25 | 11 | 42 | 39 | 38 | 24 | 20 | 27 | 23 | 21 | 13 | 17 | 176 | 238 | 456 | 892 | 1572 | — | — | — | 1682 |
Swell 2 Height (m) Direction Period (s) | — | — | — | NW 7 | WNW 8 | WNW 8 | WNW 7 | WNW 7 | — | NNW 9 | NNW 9 | NNW 9 | NNW 9 | NNW 9 | WNW 10 | N 9 | N 9 | N 9 | — | — | — | — | — | — |
| kJ | — | — | — | 11 | 12 | 12 | 11 | 11 | — | 16 | 17 | 17 | 8 | 8 | 22 | 2 | 1 | 1 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | NNW 9 | ESE 3 | ESE 3 | — | — | — | — | — | — | — | N 9 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 16 | 1 | 1 | — | — | — | — | — | — | — | 6 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SE 2 | SE 3 | — | — | W 7 | W 3 | — | — | — | W 3 | W 3 | SW 3 | SW 3 | SW 3 | SW 3 | — | WNW 13 | NW 13 | NW 13 | WNW 12 |
| kJ | — | — | — | — | 1 | 1 | — | — | 27 | 3 | — | — | — | 4 | 7 | 3 | 2 | 3 | 4 | — | 2385 | 2452 | 2239 | 2165 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 8 | 8 | 8 | 16 | 16 | 8 | 8 | 27 | 187 | 52 | 42 | 42 | 751 | 408 | 387 | 254 | 331 | 300 | 380 | 380 | 380 | 771 | 587 | 364 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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