Catlins River Mouth surfForecast / Catlins / New Zealand

information circle12 Day Weather and Surf, issued 11 am Wednesday 20 Aug 2025 NZST
Forecast update in hr  min  s Forecast update imminent
Catlins River Mouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Catlins River Mouth sea temperature is
11.1° C
(Which is 2.0°C warmer than normal for this time of year)


Best Forecast Surf Conditions for Catlins River Mouth this week:

The surf forecast for Catlins River Mouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 21) at 12AM. The primary swell is predicted to be 2.3m and 16s period with a secondary swell of 0.2m and 10s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Catlins River Mouth in the next 12 days are 2.3m 16s and forecast to arrive on Thursday (Aug 21) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Sunday (Aug 24) at 9PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Thu 21st Aug)7.5ft (2.3m) 16s
Best Surf12AM (Thu 21st Aug)7.5ft (2.3m) 16s
Most Powerful12AM (Thu 21st Aug)7.5ft (2.3m) 16s

Table - best surf conditions forecast for Catlins River Mouth over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Very mild (max 10°C on Wed afternoon, min 7°C on Fri night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Very mild (max 14°C on Sun afternoon, min 6°C on Sat morning). Wind will be generally light.

Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunday
24
Monday
25
Tuesday
26
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
3
2
4
4
3
4
4
3
3
3
1
3
4
3
2
2
3
2
3
4
3
Swell
Height Map
Wave Height (m) & direction (?)
1.8
SSW
2.2
SSW
2.3
SSW
2.1
SSW
2.1
SSW
1.9
SSW
2
SSW
1.8
SSW
1.3
SSW
1.2
SSW
1.1
SSW
1.2
SSW
1.3
SSW
1.3
SSW
1
SSW
1.1
SSW
1.3
SSW
1.2
SSW
1
SSW
1.3
SSW
1.2
SSW
Period(s) (?)151516161516161514161516171615151514141816
Wave
Graph
(?)Metric surfscale
Energy (?)163920922458205420401753202015751036719595688174311524855746676168371486751
Wind
(km/h)
15
W
20
SW
10
WSW
10
W
15
SW
15
WNW
10
NW
5
S
10
NW
5
NNW
15
ENE
10
NW
15
NW
5
NW
10
NW
10
NNW
5
W
10
WNW
10
NW
5
WSW
10
NNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
crosscross-
off
cross-
off
crosscross-
off
offcross-
on
offoffcrossoffoffoffoffcross-
off
glassoffoffcross-
off
cross-
off
High Tide
/ height (m)
12:40PM
2.33
1:03AM
2.31
1:34PM
2.37
1:53AM
2.37
2:23PM
2.40
2:39AM
2.41
3:07PM
2.42
3:21AM
2.43
3:47PM
2.42
4:00AM
2.43
4:24PM
2.41
4:39AM
2.40
5:00PM
2.38
Low Tide
/ height (m)
6:55PM
0.89
7:18AM
0.74
7:47PM
0.81
8:08AM
0.67
8:33PM
0.75
8:54AM
0.63
9:15PM
0.72
9:36AM
0.64
9:55PM
0.73
10:16AM
0.69
10:34PM
0.78
10:56AM
0.77
11:12PM
0.85
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunday
24
Monday
25
Tuesday
26
Sunrise7:33--7:31--7:30--7:28--7:26--7:24--7:22--
Sunset-5:54--5:57--5:58--5:59--6:00--6:01--6:02-
cloud
part cloud
cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
part cloud
Rain (mm)
---------------------
Temp. °C91091010109108889111413111111131411
Feels °C (?)4565666866467111089910119
  • 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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Eyeball surf reportRecent Eyeball Surf Reports for Catlins

  1. weather stationWind Update The wind is still cross-off at Catlins River Mouth (fresh winds from the WSW at Nugget Point Automatic Weather Station 8 km from Catlins River Mouth). 2.6m 13s groundswell from the SSW with a 1.9m 14s groundswell, also from the SSW. 2 swells combining so expect closeout sets.

    Catlins River Mouth
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1 h 20 min ago

30 km/h
WSW
Cross-Off
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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 12 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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