Surf Forecasts:
Catlins River Mouth surf forecast from 25 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 3AM (local time) - 13ft (4.0m), 13s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 31 Aug, 12AM (local time) - 18ft (5.5m), 16s period, SW swell with 15,277 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 3AM (local time) - 13ft (4.0m), 13s period with SW 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 Wednesday (Aug 26) at 3AM. The primary swell is predicted to be 4.0m and 13s period with a secondary swell of 2.1m and 14s. Another secondary swell of 0.2m and 14s is also forecast. 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 5.5m 16s and forecast to arrive on Monday (Aug 31) 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 2.5m 8s period and expected on Friday (Aug 28) at 12AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Wed 26th Aug) | 13ft (4.0m) 13s |
| Best Surf | 3AM (Wed 26th Aug) | 13ft (4.0m) 13s |
| Most Powerful | 12AM (Mon 31st Aug) | 18ft (5.5m) 16s |
Table - best surf conditions forecast for Catlins River Mouth over the next 16 days.
Short Range ForecastLight rain (total 8mm), mostly falling on Thu afternoon. Very mild (max 13°C on Fri morning, min 6°C on Wed night). Winds decreasing (strong winds from the NE on Thu morning, light winds from the NNE by Thu night). | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Sat night. Very mild (max 14°C on Sat afternoon, min 2°C on Sun night). Winds increasing (light winds from the WSW on Sat afternoon, strong winds from the SW by Sun afternoon). | |||||||||||||||||||
Tue 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SW 14 | SW 14 | SSW 14 | SSW 13 | SSW 15 | S 14 | S 13 | ENE 8 | ENE 9 | ENE 10 | SW 7 | SSW 19 | SSW 18 | SSW 17 | SW 15 | SSW 15 | SW 16 | SSW 16 | SSW 15 | SW 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 8711 | 6039 | 1674 | 1188 | 2916 | 2006 | 1226 | 578 | 344 | 341 | 327 | 295 | 437 | 419 | 2665 | 5437 | 15277 | 4400 | 2860 | 8020 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-on | cross-on | cross | cross | cross-off | off | cross-off | cross-off | off | off | off | cross-off | cross | cross-off | off | cross-off | cross-off |
High Tide | 1:32AM2.19m | 1:56PM2.23m | 2:09AM2.24m | 2:33PM2.29m | 2:45AM2.30m | 3:09PM2.33m | 3:20AM2.36m | 3:44PM2.38m | 3:57AM2.40m | 4:21PM2.40m | 4:36AM2.42m | 4:59PM2.40m | ||||||||
Low Tide | 7:30PM0.99m | 7:46AM0.88m | 8:06PM0.89m | 8:24AM0.80m | 8:41PM0.82m | 9:00AM0.74m | 9:16PM0.77m | 9:37AM0.70m | 9:53PM0.74m | 10:15AM0.70m | 10:32PM0.74m | 10:56AM0.73m | 11:13PM0.76m | |||||||
 |  |  |  |  | |  | | | | |  | |  | |  | | | | | |
 | — | — | 7:22 | — | — | 7:20 | — | — | 7:18 | — | — | 7:16 | — | — | 7:16 | — | — | 7:13 | — | — |
 | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — |
mm | — | 1 | 1 | — | — | — | 6 | — | — | — | 1 | — | — | 4 | 1 | 2 | — | — | — | — |
Temp °C | 11 | 10 | 9 | 9 | 7 | 7 | 8 | 8 | 13 | 13 | 9 | 12 | 14 | 11 | 7 | 6 | 6 | 10 | 11 | 11 |
Feels °C | 6 | 4 | 5 | 5 | 3 | -2 | -1 | 2 | 9 | 9 | 3 | 8 | 10 | 7 | -2 | -4 | -2 | 3 | 5 | 5 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 15 | S 14 | S 13 | ENE 8 | ENE 9 | ENE 10 | SW 7 | SSW 8 | SSW 18 | SSW 17 | NE 7 | E 12 | SSW 16 | SSW 16 | SSW 15 | SSW 14 |
| kJ | 2930 | 1933 | 1674 | 1188 | 2916 | 2006 | 1226 | 578 | 344 | 341 | 152 | 72 | 437 | 419 | 11 | 11 | 7690 | 4400 | 2860 | 2774 |
Swell 2 Height (m) Direction Period (s) | ESE 14 | ESE 13 | ESE 14 | S 16 | ESE 13 | ESE 12 | — | SSW 12 | S 10 | S 10 | ENE 10 | SSW 19 | SW 13 | SW 7 | SE 12 | SE 12 | — | — | E 10 | E 11 |
| kJ | 36 | 17 | 19 | 1004 | 16 | 14 | — | 283 | 171 | 161 | 143 | 295 | 170 | 47 | 6 | 6 | — | — | 9 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | ESE 13 | — | — | — | S 10 | SW 12 | SSW 11 | SSE 10 | ENE 9 | ENE 8 | ENE 6 | — | — | — | — | — | — |
| kJ | — | — | — | 17 | — | — | — | 208 | 144 | 85 | 108 | 44 | 26 | 13 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 14 | SW 14 | — | — | — | ENE 4 | ENE 6 | ENE 8 | — | SW 3 | SW 7 | NW 2 | — | — | SW 15 | SSW 15 | SW 16 | WNW 3 | W 3 | SW 14 |
| kJ | 8711 | 6039 | — | — | — | 34 | 292 | 970 | — | 3 | 327 | 1 | — | — | 2665 | 5437 | 15277 | 7 | 7 | 8020 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 8 | 8 | 0 | 8 | 181 | 297 | 549 | 0 | 0 | 21 | 21 | 0 | 0 | 0 | 297 | 472 | 57 | 57 | 109 | 57 |
Best forecast wave conditions in Catlins | ||||||||||||||||||||
Best forecast wave conditions in New Zealand | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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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