Surf Forecasts:
How big are the waves at Castlerock today (27 Jun):
- Morning surf: Morning surf (27 Jun, local time) - 1ft (0.3m), 9s period with WNW swell.
- Afternoon surf: Afternoon surf (27 Jun, local time) - 1.5ft (0.4m), 9s period with NW swell.
- Evening surf: Evening surf (27 Jun, local time) - 1.5ft (0.4m), 9s period with NW swell.
The current surf forecast for Castlerock at 6AM is: 0.2m 9s primary swell from a West-northwest direction and 0.3m 5s secondary swell from a North-northwest direction (forecast issued at 12:00am June 27). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (27 Jun) | 1ft (0.3m) | 9s |
| Afternoon (27 Jun) | 1.5ft (0.4m) | 9s |
| Evening (27 Jun) | 1.5ft (0.4m) | 9s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 8mm), mostly falling on Sat night. Warm (max 20°C on Fri night, min 12°C on Sat night). Winds decreasing (fresh winds from the S on Sat morning, calm by Mon afternoon). | ||||||||||||||||||||||||
Saturday 27 | Sunday 28 | Monday 29 | ||||||||||||||||||||||
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 5 | NNW 5 | WNW 9 | WNW 9 | NW 9 | NW 9 | NW 9 | NW 9 | NW 8 | NW 8 | WNW 8 | WNW 8 | WNW 9 | WNW 11 | WNW 13 | WNW 13 | WNW 13 | WNW 12 | WNW 12 | WNW 12 | NW 11 | WNW 11 | NW 11 | NW 10 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 10 | 8 | 8 | 17 | 22 | 21 | 21 | 20 | 18 | 18 | 27 | 22 | 49 | 135 | 545 | 649 | 630 | 582 | 488 | 472 | 380 | 323 | 268 | 208 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | glassy | cross | cross-off |
High Tide | 5:17AM1.37m | 5:43PM1.48m | 5:55AM1.41m | 6:19PM1.56m | 6:30AM1.44m | 6:55PM1.63m | ||||||||||||||||||
Low Tide | 11:24PM0.50m | 11:37AM0.42m | 00:10AM0.44m | 12:16PM0.36m | 00:51AM0.39m | 12:52PM0.31m | ||||||||||||||||||
 | |  |  |  |  | | |  | |  | | | | | | |  | | | | | | | |
 | — | 4:48 | — | — | — | — | — | — | — | 4:48 | — | — | — | — | — | — | — | 4:48 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 10:10 | — | — | — | — | — | — | — | 10:10 | — | — | — | — | — | — | — | 10:09 |
mm | — | — | — | — | 1 | 1 | 1 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 20 | 17 | 16 | 18 | 19 | 19 | 19 | 16 | 15 | 13 | 12 | 14 | 16 | 17 | 16 | 14 | 13 | 12 | 13 | 15 | 16 | 17 | 15 | 16 |
Feels °C | 19 | 15 | 14 | 14 | 15 | 17 | 18 | 13 | 12 | 11 | 8 | 8 | 10 | 11 | 10 | 9 | 8 | 8 | 9 | 12 | 14 | 16 | 13 | 14 |
Swell 1 Height (m) Direction Period (s) | NNW 5 | NNW 5 | NNW 5 | WNW 9 | NW 9 | NW 9 | SE 4 | NW 9 | NW 8 | NW 8 | WNW 8 | WNW 8 | WNW 9 | WNW 11 | WNW 13 | WNW 13 | WNW 13 | WNW 12 | WNW 12 | WNW 12 | NW 11 | WNW 11 | NW 11 | NW 10 |
| kJ | 10 | 8 | 5 | 17 | 22 | 21 | 6 | 20 | 18 | 18 | 27 | 22 | 49 | 135 | 545 | 649 | 630 | 582 | 488 | 472 | 380 | 323 | 268 | 208 |
Swell 2 Height (m) Direction Period (s) | WNW 9 | ESE 5 | WNW 9 | NNW 5 | WNW 10 | — | NW 9 | ESE 4 | ESE 4 | E 4 | NW 12 | WNW 11 | — | NW 14 | — | — | — | — | — | — | — | — | — | — |
| kJ | 8 | 4 | 8 | 2 | 10 | — | 21 | 3 | 3 | 1 | 6 | 12 | — | 49 | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | WNW 9 | — | WNW 10 | — | — | SE 7 | — | — | W 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 8 | — | 10 | — | — | 2 | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ESE 3 | — | SE 3 | SE 3 | SE 4 | SE 4 | SSW 3 | — | — | — | — | SW 2 | SW 3 | SW 3 | WSW 3 | SW 3 | SW 3 | SW 3 | SW 3 | WSW 3 | — | — | — | — |
| kJ | 2 | — | 3 | 5 | 14 | 14 | 2 | — | — | — | — | 1 | 2 | 4 | 4 | 3 | 3 | 2 | 1 | 1 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 60 | 56 | 194 | 194 | 185 | 66 | 42 | 40 | 42 | 42 | 42 | 387 | 428 | 429 | 444 | 9 | 9 | 9 | 9 | 9 | 9 | 0 | 2 | 0 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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