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Surf Forecasts:

Castlerock surf break

Castlerock surfForecast / Londonderry / Ireland

information circle48hr Weather and Surf, issued 5 pm Wednesday 11 Mar 2026 GMT
Forecast update in hr  min  s Forecast update imminent
Castlerock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Castlerock sea temperature is
8.1° C
 (Which is normal for this time of year)

How big are the waves at Castlerock today?

The current surf forecast for Castlerock at 8PM is: 2.5m 14s primary swell from a Northwest direction (forecast issued at 05:00pm March 11). An open ocean swell of 0.7m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (GMT) & DateWave HeightWave Period
Morning (11 Mar)--
Afternoon (11 Mar)10ft (3.0m)14s
Evening (11 Mar)8ft (2.5m)13s

Table - waves today at Castlerock. (Swell directed towards the surf break)

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table
Wednesday
11
Thursday
12
Friday
13
Saturday
14
3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM
Rating
(10 max)
3
2
1
0
0
0
2
4
1
2
2
2
3
3
3
0
0
0
3
0
3
4
3
2
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
3
NW
3
NW
2.5
NW
2.3
NW
2.4
NW
2.4
NW
2.5
NW
2.5
NW
2.5
NW
3
NW
3
NW
3
NW
3.5
NW
3
NW
2.5
NW
2.5
NW
2.4
NW
2.5
NW
2.5
NW
3
NW
3
NW
3
NW
3
NW
2.5
NW
Period(s) (?)141413131414141414151616161616161616151414131313
Wave
Graph
(?)Metric surfscale
Energy kJ (?)356929402094180620732261263025702840371349614643529242473573341228683130323731373163311226992362
Wind
(km/h)
30
WSW
35
SW
40
SW
45
SW
50
SW
50
SSW
30
WSW
15
WSW
40
WSW
35
SW
40
WSW
40
SW
40
SW
35
SW
30
WSW
35
W
35
W
35
WNW
25
WNW
25
WNW
20
W
20
WSW
25
WSW
30
WSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
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-
off		cross-
off		cross-
off		crosscrosscross-
on		crosscross-
on		crosscross-
off		cross-
off		cross-
off
High Tide
/ height (m)
10:47PM
1.11
11:22AM
0.97
2:40AM
1.11
3:05PM
1.03
3:40AM
1.27
Low Tide
/ height (m)
4:26PM
0.73
6:28AM
0.84
7:07PM
0.78
9:15AM
0.77
9:07PM
0.66
10:09AM
0.63
Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunrise------6:50-------6:48-------6:46-
Sunset-6:21-------6:22-------6:24------
cloud
cloud
cloud
cloud
cloud
cloud
mod rain
heavy rain
rain showers
cloud
light rain
cloud
rain showers
cloud
part cloud
thunderstorm
thunderstorm
light rain
light rain
light rain
rain showers
part cloud
light rain
light rain
Rain (mm)
------7113-1-1--111111-11
Temp. °C98891010746532336776655467
Feels °C (?)10-1-1-1-100-4-4-7-8-7-6-1-2-2-30-2-1-200
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castlerock surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Castlerock at:
surf-forecast.com

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