Surf Forecasts:
Catlins River Mouth surf forecast from 26 Aug 2026:
- Best quality surf: Saturday 29 Aug, 3PM (local time) - 13ft (4.0m), 11s period, WSW swell with cross-offshore winds.
- Most powerful swell: Monday 31 Aug, 12PM (local time) - 20ft (6.0m), 15s period, SW swell with 14,597 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 12AM (local time) - 7ft (2.1m), 8s period with ENE 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 Friday (Aug 28) at 12AM. The primary swell is predicted to be 2.1m and 8s period with a secondary swell of 1.1m and 12s. 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 6.0m 15s and forecast to arrive on Monday (Aug 31) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Friday (Aug 28) at 12AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 28th Aug) | 7ft (2.1m) 8s |
| Best Surf | 3PM (Sat 29th Aug) | 13ft (4.0m) 11s |
| Most Powerful | 12PM (Mon 31st Aug) | 20ft (6.0m) 15s |
Table - best surf conditions forecast for Catlins River Mouth over the next 16 days.
Short Range ForecastModerate rain (total 15mm), heaviest on Thu afternoon. Very mild (max 12°C on Fri morning, min 6°C on Thu morning). Winds decreasing (strong winds from the NE on Thu afternoon, calm by Fri afternoon). | Days 4-6 Weather SummaryHeavy rain (total 36mm), heaviest during Mon morning. Very mild (max 14°C on Tue afternoon, min 5°C on Sun night). Winds decreasing (strong winds from the WSW on Mon afternoon, moderate winds from the WNW by Tue morning). | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
AM | 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) | S 14 | S 13 | ENE 8 | ENE 9 | ENE 10 | ENE 10 | SSW 19 | WSW 11 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SW 14 | SSW 15 | SSW 14 | SW 14 | S 12 | S 12 | SSW 15 | SSW 15 | SSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1977 | 1189 | 606 | 294 | 348 | 218 | 295 | 4222 | 2756 | 3246 | 5832 | 11156 | 10739 | 4404 | 7968 | 4904 | 1301 | 864 | 1001 | 1102 | 1275 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | off | glassy | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | off | off | off | off | cross-off |
High Tide | 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 | 5:18AM2.41m | 5:40PM2.37m | 6:05AM2.37m | 6:26PM2.32m | ||||||||
Low Tide | 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 | 11:39AM0.79m | 11:59PM0.80m | 12:27PM0.87m | 00:49AM0.86m | ||||||||
 |  |  |  |  |  | | |  | |  | |  | | | | | | | | | |
 | 7:20 | — | — | 7:18 | — | — | 7:16 | — | — | 7:16 | — | — | 7:13 | — | — | 7:11 | — | — | 7:09 | — | — |
 | — | 6:04 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — | — | 6:12 | — |
mm | — | 8 | — | — | 1 | 1 | — | — | 5 | 8 | 3 | 5 | 14 | 4 | 2 | — | — | — | — | 2 | — |
Temp °C | 7 | 8 | 8 | 12 | 11 | 9 | 10 | 10 | 10 | 9 | 7 | 6 | 7 | 7 | 7 | 12 | 14 | 14 | 15 | 14 | 9 |
Feels °C | -3 | -2 | 0 | 10 | 10 | 3 | 3 | 4 | 5 | 1 | -4 | -3 | -1 | -4 | 0 | 5 | 8 | 7 | 9 | 8 | 4 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 13 | ENE 8 | ENE 9 | ENE 10 | ENE 10 | SW 9 | SW 12 | SSW 16 | SSW 15 | NE 8 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | S 10 | S 12 | S 12 | SSW 15 | SSW 15 | SSW 15 |
| kJ | 1977 | 1189 | 606 | 294 | 348 | 218 | 212 | 960 | 2756 | 3246 | 11 | 7040 | 6633 | 4404 | 4882 | 1081 | 1301 | 864 | 1001 | 1102 | 1275 |
Swell 2 Height (m) Direction Period (s) | ESE 12 | — | SSW 12 | S 11 | S 10 | SW 7 | ENE 9 | SSW 18 | NE 9 | ENE 8 | — | — | — | — | — | SSW 15 | SSW 15 | SW 14 | S 11 | S 10 | SSW 10 |
| kJ | 14 | — | 333 | 275 | 208 | 91 | 71 | 337 | 20 | 7 | — | — | — | — | — | 1292 | 996 | 395 | 277 | 102 | 173 |
Swell 3 Height (m) Direction Period (s) | — | — | S 10 | SW 12 | SSW 12 | SSE 10 | SSW 19 | ENE 9 | SE 12 | SE 12 | — | — | — | — | — | — | S 20 | SSW 17 | — | SW 8 | NE 7 |
| kJ | — | — | 216 | 149 | 90 | 133 | 295 | 31 | 6 | 6 | — | — | — | — | — | — | 186 | 493 | — | 53 | 7 |
Wind waves Height (m) Direction Period (s) | ENE 5 | ENE 7 | NE 8 | — | W 3 | SW 7 | W 3 | WSW 11 | WNW 3 | WNW 3 | SSW 15 | SSW 15 | SW 14 | W 3 | SSW 14 | SW 14 | W 3 | NW 3 | NNE 4 | WNW 3 | — |
| kJ | 66 | 411 | 1097 | — | 3 | 163 | 5 | 4222 | 3 | 5 | 5832 | 11156 | 10739 | 11 | 7968 | 4904 | 2 | 2 | 10 | 4 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 465 | 153 | 0 | 0 | 0 | 0 | 57 | 57 | 57 | 170 | 377 | 427 | 69 | 563 | 263 | 57 | 57 | 57 | 57 | 57 | 8 |
Best forecast wave conditions in Catlins | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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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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