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Surf Forecasts:

Castlerock surf break

Castlerock surfForecast / Londonderry / Ireland

information circle48hr Weather and Surf, issued 6 am Monday 08 Sep 2025 BST
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
15.6° C
 (Which is 1.5°C warmer than normal for this time of year)

How big are the waves at Castlerock today?

The current surf forecast for Castlerock at 8AM is: 1.5m 12s primary swell from a Northwest direction (forecast issued at 06:00am September 08). The wind direction is predicted to be offshore and the swell rating is 3.

Time (BST) & DateWave HeightWave Period
Morning (08 Sep)5ft (1.5m)12s
Afternoon (08 Sep)5ft (1.6m)12s
Evening (08 Sep)5.5ft (1.7m)12s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Monday
08
Tuesday
09
Wednesday
10
Thu
11
4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM
Rating
(10 max)
2
3
3
3
2
3
3
3
2
2
1
1
1
0
0
0
0
1
1
2
1
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.3
WNW
1.5
NW
1.6
NW
1.6
NW
1.6
NW
1.6
NW
1.7
NW
1.7
NW
1.6
NW
1.6
NW
1.3
NW
1.2
NW
1.1
NW
1
NW
0.9
NW
0.9
NW
0.9
NW
0.9
NW
0.9
NW
1
NW
1
NW
0.9
NW
0.9
NW
0.8
NW
Period(s) (?)111212121112121212121111111010101111101010999
Wave
Graph
(?)Metric surfscale
Energy (?)411583644644622699800813736650445338254204172175200173158206199166138113
Wind
(km/h)
15
SSW
15
S
20
SSW
20
SSW
20
SSW
15
S
15
S
15
SSE
20
SE
20
SSE
20
SSE
30
SSE
30
SSE
30
SSE
30
SE
30
SSE
30
SSE
20
SSE
20
S
20
S
15
SW
20
WNW
15
SW
20
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffoffoffcross-
off		offoffoffcross-
off		cross-
off		cross-
off		offoffcross-
off		cross-
off		cross-
off		cross-
off		offoffoffcross-
off		crosscross-
off		cross-
off
High Tide
/ height (m)
7:02AM
1.72
7:25PM
2.11
7:37AM
1.76
8:00PM
2.12
8:13AM
1.76
8:37PM
2.04
Low Tide
/ height (m)
1:23AM
0.06
1:13PM
-0.04
1:55AM
0.02
1:45PM
-0.07
2:27AM
0.03
2:20PM
-0.04
Monday
08
Tuesday
09
Wednesday
10
Thu
11
Sunrise-6:45-------6:46-------6:48------
Sunset-----8:02-------8:00-------7:58--
part cloud
clear
clear
clear
rain showers
light rain
part cloud
part cloud
cloud
cloud
cloud
part cloud
cloud
light rain
part cloud
part cloud
cloud
cloud
light rain
rain showers
light rain
mod rain
light rain
rain showers
Rain (mm)
----11-------1----122611
Temp. °C111013151514121010111317161515151413131416131211
Feels °C (?)86910101196679111010101099911141097
  • 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

Eyeball surf reportRecent Eyeball Surf Reports for Londonderry

  1. weather stationWind Update The wind is still offshore at Castlerock (light winds from the SSW at Magilligan Number 2 11 km from Castlerock). A 2.0m groundswell from the NW

    1 hour 40 minutes ago Castlerock
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1 h 40 min ago

17 km/h
SSW
Offshore
Please reload the page to see if there are any updates.

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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