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Surf Forecasts:

Castlerock surf break

Castlerock surfForecast / Londonderry / Ireland

information circle48hr Weather and Surf, issued 5 am Thursday 20 Nov 2025 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
12.3° C
 (Which is 1.3°C warmer than normal for this time of year)

How big are the waves at Castlerock today?

The current surf forecast for Castlerock at 10AM is: 2.0m 7s primary swell from a North-northwest direction and 0.1m 11s secondary swell from a West direction (forecast issued at 05:00am November 20). The wind direction is predicted to be onshore.

Time (GMT) & DateWave HeightWave Period
Morning (20 Nov)7ft (2.1m)8s
Afternoon (20 Nov)6ft (1.8m)7s
Evening (20 Nov)4.5ft (1.3m)6s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Thursday
20
Friday
21
Saturday
22
Sun
23
3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM
Rating
(10 max)
0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
0
1
0
0
0
1
2
2
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
2.2
NNW
2.2
NNW
2.1
NNW
1.9
NNW
1.8
NNW
1.6
N
1.3
NNW
1
N
0.8
NNW
0.6
NNW
0.5
NNW
0.4
NW
0.4
NW
0.4
NW
0.7
WNW
0.7
WNW
0.9
WNW
0.4
NW
0.4
NW
0.4
NW
1
NW
1
NW
1
NW
0.9
NW
Period(s) (?)888777666661414149101113131312121111
Wave
Graph
(?)Metric surfscale
Energy kJ (?)540540469365317240143784626194851487692196444346297264242198
Wind
(km/h)
40
N
40
N
30
N
35
N
35
N
30
N
15
N
10
NW
10
WSW
15
SW
15
SSW
20
S
25
S
30
S
25
S
20
SW
20
WSW
20
WSW
15
WSW
15
W
15
WSW
15
SSW
15
S
20
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
onononononononcross-
on		cross-
off		cross-
off		offoffoffoffoffcross-
off		cross-
off		cross-
off		cross-
off		crosscross-
off		cross-
off		offoff
High Tide
/ height (m)
5:40AM
1.67
5:52PM
1.60
6:10AM
1.70
6:22PM
1.56
6:42AM
1.69
6:52PM
1.51
Low Tide
/ height (m)
12:02PM
0.26
12:09AM
0.23
12:35PM
0.28
12:37AM
0.25
1:09PM
0.33
Thursday
20
Friday
21
Saturday
22
Sun
23
Sunrise--8:07-------8:10-------8:11-----
Sunset----4:15-------4:14-------4:13---
light rain
light rain
light rain
rain showers
rain showers
rain showers
rain showers
part cloud
clear
clear
cloud
cloud
cloud
cloud
light rain
light rain
part cloud
part cloud
clear
part cloud
cloud
cloud
cloud
cloud
Rain (mm)
2211111-------32--------
Temp. °C566776665544554567799876
Feels °C (?)-5-4-3-2-2-20200-1-3-2-2-3012355431
  • 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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