Surf Forecasts:
How big are the waves at Castlerock today (25 Jun):
- Morning surf: Morning surf (25 Jun, local time) - 1.5ft (0.4m), 10s period with WNW swell.
- Afternoon surf: Afternoon surf (25 Jun, local time) - 1.5ft (0.4m), 10s period with WNW swell.
- Evening surf: Evening surf (25 Jun, local time) - 1.5ft (0.4m), 10s period with WNW swell.
The current surf forecast for Castlerock at 6AM is: 0.4m 9s primary swell from a West-northwest direction and 0.2m 11s secondary swell from a West-northwest direction (forecast issued at 12:00am June 25). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (25 Jun) | 1.5ft (0.4m) | 10s |
| Afternoon (25 Jun) | 1.5ft (0.4m) | 10s |
| Evening (25 Jun) | 1.5ft (0.4m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 18mm), heaviest on Thu night. Warm (max 22°C on Thu afternoon, min 13°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 25 | Friday 26 | Saturday 27 | ||||||||||||||||||||||
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 | WNW 9 | WNW 10 | WNW 10 | WNW 11 | WNW 10 | WNW 10 | NNW 5 | N 5 | WNW 10 | N 5 | NNW 5 | NNW 5 | NNW 5 | N 5 | N 5 | NNW 5 | WNW 9 | WNW 9 | NW 10 | NW 9 | NW 9 | NW 9 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 16 | 18 | 35 | 40 | 42 | 44 | 43 | 35 | 23 | 23 | 19 | 23 | 35 | 28 | 28 | 20 | 13 | 9 | 8 | 15 | 14 | 21 | 21 | 20 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross | cross-on | cross-on | cross-on | cross | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | glassy | cross-off | off | off | off | off | off | off | cross-off | glassy |
High Tide | 3:44AM1.35m | 4:19PM1.30m | 4:35AM1.35m | 5:04PM1.40m | 5:17AM1.37m | 5:43PM1.48m | ||||||||||||||||||
Low Tide | 10:07AM0.52m | 10:28PM0.55m | 10:55AM0.48m | 11:24PM0.50m | 11:37AM0.42m | |||||||||||||||||||
 | |  |  | |  | |  |  | |  | | | | |  |  | | | | | | | | |
 | — | 4:47 | — | — | — | — | — | — | — | 4:48 | — | — | — | — | — | — | — | 4:48 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 10:10 | — | — | — | — | — | — | — | 10:10 | — | — | — | — | — | — | — | 10:10 |
mm | — | — | — | — | — | 1 | 1 | 2 | 3 | 1 | 1 | 1 | 2 | 1 | — | — | — | — | — | — | 1 | 1 | 3 | 1 |
Temp °C | 14 | 14 | 15 | 17 | 18 | 22 | 19 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 15 | 18 | 19 | 16 | 16 | 19 | 19 | 20 | 20 | 16 |
Feels °C | 13 | 13 | 14 | 16 | 18 | 23 | 19 | 10 | 12 | 11 | 11 | 11 | 11 | 13 | 16 | 18 | 19 | 15 | 14 | 16 | 16 | 18 | 19 | 17 |
Swell 1 Height (m) Direction Period (s) | NW 8 | NW 8 | WNW 9 | WNW 10 | WNW 10 | WNW 11 | WNW 10 | WNW 10 | WNW 10 | N 5 | WNW 10 | WNW 10 | NNW 5 | NNW 5 | NNW 5 | N 5 | N 5 | NNW 5 | NNW 5 | WNW 9 | NW 10 | NW 9 | SE 4 | NW 9 |
| kJ | 16 | 18 | 35 | 40 | 42 | 44 | 43 | 35 | 20 | 23 | 19 | 19 | 35 | 28 | 28 | 20 | 13 | 9 | 5 | 15 | 14 | 21 | 4 | 20 |
Swell 2 Height (m) Direction Period (s) | — | — | WNW 11 | — | — | — | — | — | — | WNW 10 | — | — | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | NNW 5 | W 8 | — | NW 9 | SE 4 |
| kJ | — | — | 12 | — | — | — | — | — | — | 20 | — | — | 19 | 9 | 9 | 9 | 9 | 8 | 8 | 4 | 5 | — | 21 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 10 | N 4 | — | — | SE 6 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 9 | 2 | — | — | 2 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NE 3 | NNE 3 | N 4 | NNW 5 | — | N 5 | N 5 | — | — | — | — | — | ESE 3 | SE 3 | SE 3 | SSE 3 | SSE 3 | SSW 3 | — |
| kJ | — | — | — | — | — | 1 | 1 | 10 | 23 | — | 16 | 23 | — | — | — | — | — | 1 | 2 | 2 | 4 | 6 | 2 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 40 | 40 | 16 | 40 | 16 | 14 | 25 | 70 | 40 | 76 | 78 | 122 | 66 | 63 | 40 | 40 | 40 | 40 | 56 | 194 | 390 | 390 | 42 | 41 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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