Surf Forecasts:
Catlins River Mouth surf forecast from 8 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, 6AM (local time) - 21ft (6.5m), 16s period, SW swell with 21,250 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 12AM (local time) - 1.5ft (0.5m), 20s period with S 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 (Sep 09) at 12AM. The primary swell is predicted to be 0.5m and 20s period with a secondary swell of 0.5m and 11s. The wind is predicted to be 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 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Monday (Sep 14) at 9AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Wed 9th Sep) | 1.5ft (0.5m) 20s |
| Best Surf | 6PM (Thu 10th Sep) | 11ft (3.5m) 18s |
| Most Powerful | 6AM (Sat 12th Sep) | 21ft (6.5m) 16s |
Table - best surf conditions forecast for Catlins River Mouth over the next 16 days.
Short Range ForecastLight rain (total 7mm), mostly falling on Wed night. Very mild (max 12°C on Wed afternoon, min 5°C on Tue night). Winds increasing (calm on Tue afternoon, fresh winds from the W by Fri morning). | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Sat morning. Very mild (max 11°C on Mon morning, min 5°C on Fri night). Winds decreasing (strong winds from the W on Fri afternoon, light winds from the WNW by Sun afternoon). | |||||||||||||||||||
Tue 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | ||||||||||||||
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) | SSW 21 | S 20 | SSW 18 | SSW 18 | SSW 16 | SSW 19 | SSW 18 | SSW 18 | SW 17 | SW 13 | SSW 15 | SSW 17 | SSW 16 | SSW 16 | SW 14 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SW 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 85 | 194 | 251 | 322 | 1479 | 3612 | 6317 | 6343 | 15238 | 4944 | 11439 | 9907 | 13469 | 9567 | 9305 | 3865 | 2906 | 1125 | 693 | 752 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off |
High Tide | 00:54AM2.37m | 1:25PM2.42m | 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 | ||||||||
Low Tide | 6:47PM0.79m | 7:11AM0.64m | 7:38PM0.70m | 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 | |||||||
 |  |  |  |  |  | |  |  | | | | | | | | | | | | |
 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — |
 | 6:19 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:23 | — | — | 6:24 | — | — | 6:27 | — |
mm | — | — | — | — | 5 | 1 | — | — | 1 | 2 | 1 | 4 | 2 | 2 | — | — | — | — | — | — |
Temp °C | 9 | 6 | 11 | 12 | 7 | 8 | 9 | 9 | 10 | 10 | 7 | 7 | 8 | 8 | 9 | 9 | 10 | 11 | 15 | 13 |
Feels °C | 7 | 3 | 7 | 9 | 1 | 1 | 1 | 1 | 3 | 1 | -2 | -2 | -1 | 2 | 4 | 5 | 5 | 6 | 11 | 9 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 20 | SSW 18 | SW 13 | SSW 16 | SSW 19 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | S 10 | SW 14 |
| kJ | 29 | 194 | 251 | 212 | 1479 | 3612 | 6317 | 6343 | 4606 | 4944 | 8055 | 9907 | 10342 | 6568 | 4490 | 3865 | 2906 | 1125 | 392 | 752 |
Swell 2 Height (m) Direction Period (s) | ENE 5 | SW 11 | SW 12 | SSW 18 | S 22 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | E 8 | — | — | — | — | ENE 13 | ENE 13 | E 12 | S 10 | SSW 15 | S 10 |
| kJ | 6 | 60 | 87 | 322 | 238 | 30 | 23 | 13 | 12 | 5 | — | — | — | — | 17 | 16 | 3 | 470 | 693 | 192 |
Swell 3 Height (m) Direction Period (s) | SSW 21 | S 8 | S 8 | ENE 11 | NE 9 | ENE 9 | — | — | — | — | — | — | — | — | — | — | — | E 12 | E 12 | SSE 12 |
| kJ | 85 | 18 | 4 | 11 | 23 | 59 | — | — | — | — | — | — | — | — | — | — | — | 3 | 3 | 52 |
Wind waves Height (m) Direction Period (s) | — | — | NE 4 | NE 3 | — | SW 7 | — | — | SW 17 | SW 13 | SSW 15 | W 4 | SSW 16 | SSW 16 | SW 14 | — | — | W 6 | WNW 3 | — |
| kJ | — | — | 3 | 3 | — | 85 | — | — | 15238 | 4887 | 11439 | 19 | 13469 | 9567 | 9305 | — | — | 114 | 3 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 21 | 8 | 109 | 57 | 61 | 161 | 256 | 147 | 402 | 147 | 21 | 0 | 21 | 0 | 0 | 0 |
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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