Surf Forecasts:
How big are the waves at Castlerock today (03 Sep):
- Morning surf: Morning surf (03 Sep, local time) - 1.5ft (0.5m), 7s period with NW swell.
- Afternoon surf: Afternoon surf (03 Sep, local time) - 1.5ft (0.5m), 6s period with NW swell.
- Evening surf: Evening surf (03 Sep, local time) - 2.5ft (0.8m), 9s period with WNW swell.
The current surf forecast for Castlerock at 4AM is: 0.4m 7s primary swell from a West-northwest direction and 0.3m 9s secondary swell from a North-northwest direction, 0.4m 3s secondary swell from a West direction (forecast issued at 12:00am September 03). The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (03 Sep) | 1.5ft (0.5m) | 7s |
| Afternoon (03 Sep) | 1.5ft (0.5m) | 6s |
| Evening (03 Sep) | 2.5ft (0.8m) | 9s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 2mm), mostly falling on Fri morning. Very mild (max 18°C on Wed night, min 12°C on Fri night). Winds decreasing (fresh winds from the WSW on Thu night, light winds from the SSW by Sat morning). | ||||||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | ||||||||||||||||||||||
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) | NNW 8 | WNW 7 | WNW 7 | NW 7 | NW 7 | NW 6 | WNW 7 | WNW 9 | WNW 9 | WNW 11 | WNW 12 | NW 13 | WNW 13 | WNW 12 | NW 13 | NW 9 | NW 12 | NW 12 | NW 11 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 24 | 20 | 32 | 23 | 21 | 20 | 31 | 94 | 96 | 242 | 756 | 1609 | 1452 | 1320 | 1503 | 449 | 1094 | 826 | 647 | 432 | 311 | 241 | 170 | 114 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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 | cross | cross-off | cross-off | off | off | cross-off | off |
High Tide | 10:03PM1.61m | 10:22AM1.44m | 10:51PM1.42m | 11:21AM1.31m | 00:04AM1.23m | 1:05PM1.23m | ||||||||||||||||||
Low Tide | 4:16AM0.41m | 4:29PM0.43m | 5:07AM0.54m | 5:44PM0.59m | 6:33AM0.65m | 8:00PM0.66m | ||||||||||||||||||
 |  |  |  | | | |  | | | | |  | | | | | | |  | | |  |  | |
 | — | 6:35 | — | — | — | — | — | — | — | 6:37 | — | — | — | — | — | — | — | 6:39 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:15 | — | — | — | — | — | — | — | 8:13 | — | — | — | — | — | — | — | 8:10 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | 1 | 1 |
Temp °C | 16 | 15 | 13 | 15 | 17 | 17 | 15 | 15 | 14 | 13 | 14 | 14 | 15 | 15 | 14 | 13 | 13 | 12 | 12 | 13 | 16 | 16 | 14 | 14 |
Feels °C | 12 | 11 | 10 | 12 | 13 | 12 | 11 | 11 | 9 | 7 | 7 | 7 | 8 | 8 | 8 | 7 | 8 | 8 | 9 | 11 | 14 | 13 | 11 | 9 |
Swell 1 Height (m) Direction Period (s) | WNW 7 | WNW 7 | WNW 7 | NW 7 | NW 7 | NW 6 | WNW 7 | WNW 9 | WNW 9 | WNW 11 | WNW 12 | NW 13 | — | — | — | NW 9 | NW 12 | NW 12 | NW 11 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 |
| kJ | 19 | 20 | 32 | 23 | 21 | 20 | 31 | 94 | 96 | 242 | 756 | 1609 | — | — | — | 437 | 1094 | 826 | 647 | 432 | 311 | 241 | 170 | 114 |
Swell 2 Height (m) Direction Period (s) | NNW 8 | NNW 9 | NNW 9 | NNW 9 | NNW 9 | N 9 | N 9 | N 9 | NW 11 | N 8 | — | — | — | — | — | NW 12 | — | — | — | — | — | — | — | — |
| kJ | 24 | 16 | 17 | 17 | 8 | 6 | 6 | 2 | 31 | 1 | — | — | — | — | — | 449 | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | N 9 | — | N 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 2 | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 3 | W 3 | — | SW 2 | WSW 2 | SW 2 | SW 3 | SW 3 | SW 3 | SW 3 | WSW 3 | W 4 | WNW 13 | WNW 12 | NW 13 | — | — | — | — | — | — | — | SSE 2 | SSE 3 |
| kJ | 2 | 2 | — | 1 | 1 | 2 | 4 | 3 | 3 | 4 | 6 | 19 | 1452 | 1320 | 1503 | — | — | — | — | — | — | — | 1 | 4 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 187 | 54 | 42 | 42 | 44 | 408 | 387 | 9 | 9 | 380 | 380 | 601 | 780 | 771 | 771 | 364 | 172 | 162 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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