Catlins River Mouth Surf Break

Lat Long: 46.48° S 169.72° E

Catlins River Mouth Surf Forecast and Surf Report

Issued: 11 pm 09 Sep 2026 (local time)

Forecast update in  hr  min

Today's Catlins River Mouth sea temperature is
10.9°C
1.8° 

Catlins River Mouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Catlins River Mouth surf forecast from 9 Sep 2026:

  • Best quality surf: Thursday 10 Sep, 6PM (local time) - 11ft (3.5m), 18s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Saturday 12 Sep, 12PM (local time) - 21ft (6.5m), 16s period, SW swell with 21,499 kJ wave energy.
  • Next surfable swell (1★+): Thursday 10 Sep, 6PM (local time) - 11ft (3.5m), 18s period with SSW swell.

Best Forecast Surf Conditions for Catlins River Mouth this week:

The surf forecast for Catlins River Mouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 10) at 6PM. The primary swell is predicted to be 3.5m and 18s period with a secondary swell of 0.4m and 8s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Catlins River Mouth in the next 16 days are 6.5m 16s and forecast to arrive on Saturday (Sep 12) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Thursday (Sep 10) at 6AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Thu 10th Sep)11ft (3.5m) 18s
Best Surf 6PM (Thu 10th Sep)11ft (3.5m) 18s
Most Powerful12PM (Sat 12th Sep)21ft (6.5m) 16s

Table - best surf conditions forecast for Catlins River Mouth over the next 16 days.


Short Range Forecast

Moderate rain (total 19mm), heaviest on Wed night. Very mild (max 10°C on Fri morning, min 4°C on Wed night). Winds increasing (light winds from the NW on Wed night, strong winds from the WSW by Fri night).

Days 5-7 Weather Summary

Light rain (total 7mm), mostly falling on Sat night. Very mild (max 16°C on Tue morning, min 8°C on Sat night). Winds decreasing (fresh winds from the W on Sat night, calm by Mon afternoon).

Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
4
4
5
3
!
!
!
!
!
!
4
2
!
3
3
2
2
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
SSW
16
2.3
SSW
19
3
SSW
18
3
SSW
18
3
SSW
17
5
SW
15
5.5
SW
15
6
SSW
16
6
SW
16
3.5
SSW
16
4
SSW
16
3
SSW
16
2
SSW
15
3.5
SW
14
1.6
SSW
15
1.3
SSW
14
1
SSW
14
0.9
SW
13
0.6
SW
13
Wave Graph
Metric surfscale
Energy kJ
1608
3920
6180
5976
4606
9900
14178
16507
19400
6112
7806
4075
1787
4968
1147
732
390
249
138
Wind (km/h)
15
WNW
20
W
25
WSW
20
NW
35
WNW
35
WSW
40
WSW
35
W
35
W
30
WSW
25
WSW
25
W
30
W
25
W
10
W
10
NNW
15
NNW
10
NNE
10
WSW
Wind State
off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
High Tide
1:44AM2.45m
2:14PM2.48m
2:31AM2.52m
2:59PM2.51m
3:16AM2.55m
3:42PM2.52m
3:59AM2.54m
4:22PM2.50m
4:41AM2.49m
5:01PM2.44m
5:24AM2.42m
5:40PM2.36m
Low Tide
8:01AM0.57m
8:24PM0.64m
8:48AM0.55m
9:08PM0.62m
9:32AM0.58m
9:51PM0.65m
10:15AM0.66m
10:34PM0.72m
10:57AM0.77m
11:16PM0.82m
11:40AM0.90m
11:59PM0.93m
rain showers
rain showers
rain showers
part cloud
light rain
rain showers
rain showers
part cloud
part cloud
rain showers
part cloud
part cloud
part cloud
cloud
cloud
part cloud
part cloud
cloud
heavy rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:52
6:50
6:48
6:47
6:45
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:22
6:22
6:23
6:24
6:27
6:28
 mm
9
1
1
1
3
4
7
14
Temp °C
5
8
9
9
10
9
7
8
9
10
11
12
11
13
15
13
16
16
12
Feels °C
-2
1
3
2
2
0
-2
0
1
3
5
6
6
8
12
10
12
14
9
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Catlins River Mouth Surf forecast

The above surf forecast table for Catlins River Mouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Catlins River Mouth can be found by selecting the local surf guide option on the grey menu. Our Catlins River Mouth surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Catlins River Mouth) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Catlins River Mouth may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Catlins River Mouth is 91 km (57 miles) from Dunedin. If you plan a holiday in Catlins, look for hotels and other accommodation in Dunedin. Dunedin has rooms for a wide range of budgets as well as car hire and transport links.

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