Surf Forecasts:
How big are the waves at Castlerock today (10 Sep):
- Morning surf: Morning surf (10 Sep, local time) - 1.5ft (0.4m), 7s period with NW swell.
- Afternoon surf: Afternoon surf (10 Sep, local time) - 1.5ft (0.4m), 11s period with WNW swell.
- Evening surf: Evening surf (10 Sep, local time) - 1ft (0.3m), 12s period with WNW swell.
The current surf forecast for Castlerock at 7PM is: 0.3m 12s primary swell from a West-northwest direction and 0.3m 6s secondary swell from a West-northwest direction (forecast issued at 12:00pm September 10). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (10 Sep) | 1.5ft (0.4m) | 7s |
| Afternoon (10 Sep) | 1.5ft (0.4m) | 11s |
| Evening (10 Sep) | 1ft (0.3m) | 12s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 16mm), heaviest on Fri night. Very mild (max 18°C on Sat morning, min 12°C on Thu night). Winds decreasing (fresh winds from the SSE on Thu morning, calm by Sat night). | |||||||||||||||||||||
Thu 10 | Friday 11 | Saturday 12 | |||||||||||||||||||
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 8 | WNW 8 | WNW 11 | WNW 12 | WNW 12 | WNW 12 | WNW 6 | NW 6 | NW 8 | NW 8 | NW 8 | NW 9 | NW 12 | NW 11 | NW 13 | NW 13 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 11 | 12 | 40 | 26 | 28 | 29 | 44 | 56 | 129 | 135 | 120 | 135 | 389 | 263 | 609 | 710 | 710 | 790 | 765 | 584 | 565 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross-off | off | off | off | off | off | cross-off | cross-off | cross-off | cross-on | on | glassy |
High Tide | 6:36PM2.05m | 6:48AM1.67m | 7:11PM2.08m | 7:21AM1.71m | 7:44PM2.04m | ||||||||||||||||
Low Tide | 12:25PM0.03m | 1:11AM0.05m | 12:59PM-0.04m | 1:42AM0.04m | 1:33PM-0.05m | ||||||||||||||||
 | |  |  |  |  | | |  | | | | |  | |  | | | | |  | |
 | 6:48 | — | — | — | — | — | 6:50 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | — | — |
 | — | — | — | 7:58 | — | — | — | — | — | — | — | 7:54 | — | — | — | — | — | — | — | 7:52 | — |
mm | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | 3 | 1 | 7 | 1 | — | — | — | — |
Temp °C | 14 | 15 | 16 | 16 | 14 | 14 | 12 | 12 | 14 | 15 | 16 | 16 | 13 | 12 | 14 | 16 | 17 | 18 | 18 | 15 | 15 |
Feels °C | 9 | 12 | 12 | 12 | 10 | 9 | 8 | 7 | 10 | 12 | 14 | 13 | 9 | 7 | 9 | 13 | 15 | 16 | 16 | 15 | 16 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | SE 4 | WNW 11 | WNW 12 | WNW 8 | WNW 12 | WNW 11 | NW 6 | NW 8 | NW 8 | NW 8 | NW 9 | NW 12 | NW 11 | NW 13 | NW 13 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 |
| kJ | 11 | 7 | 40 | 26 | 20 | 27 | 22 | 56 | 129 | 135 | 120 | 135 | 389 | 263 | 609 | 710 | 710 | 790 | 765 | 584 | 565 |
Swell 2 Height (m) Direction Period (s) | NW 7 | WNW 8 | ESE 4 | WNW 6 | WNW 12 | — | — | WNW 10 | W 10 | — | NW 12 | NW 12 | — | NW 14 | — | — | — | — | — | — | — |
| kJ | 2 | 12 | 1 | 8 | 28 | — | — | 11 | 17 | — | 34 | 87 | — | 179 | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | N 7 | NW 7 | ESE 7 | ESE 4 | — | — | — | — | — | — | — | NW 16 | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 2 | 4 | 1 | — | — | — | — | — | — | — | 11 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 3 | SSW 3 | SW 3 | WSW 3 | W 3 | WNW 6 | WNW 6 | — | — | — | — | — | — | S 2 | S 3 | SSE 4 | — | — | — | — | — |
| kJ | 7 | 1 | 2 | 2 | 3 | 29 | 44 | — | — | — | — | — | — | 1 | 4 | 4 | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 162 | 42 | 254 | 415 | 300 | 300 | 300 | 172 | 162 | 0 | 0 | 0 | 0 | 387 | 387 | 9 | 9 | 71 | 42 | 63 | 0 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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