Surf Forecasts:
Catlins River Mouth surf forecast from 31 Jul 2026:
- Best quality surf: Saturday 1 Aug, 12AM (local time) - 16ft (5.0m), 12s period, S swell with cross-shore winds.
- Most powerful swell: Tuesday 4 Aug, 3AM (local time) - 16ft (5.0m), 14s period, SSW swell with 9,951 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 12AM (local time) - 16ft (5.0m), 12s 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 Saturday (Aug 01) at 12AM. The primary swell is predicted to be 5.0m and 12s period with a secondary swell of 4.5m and 12s. Another secondary swell of 0.4m and 10s is also forecast. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Catlins River Mouth in the next 16 days are 5.0m 14s and forecast to arrive on Tuesday (Aug 04) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Sunday (Aug 02) at 3PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sat 1st Aug) | 16ft (5.0m) 12s |
| Best Surf | 12AM (Sat 1st Aug) | 16ft (5.0m) 12s |
| Most Powerful | 3AM (Tue 4th Aug) | 16ft (5.0m) 14s |
Table - best surf conditions forecast for Catlins River Mouth over the next 16 days.
Short Range ForecastLight rain (total 8mm), mostly falling on Fri afternoon. Very mild (max 12°C on Sun afternoon, min 3°C on Sat morning). Winds decreasing (near gales from the SSW on Fri afternoon, light winds from the WNW by Sat morning). | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Mon morning. Mild temperatures (max 8°C on Mon morning, min 3°C on Wed night). Winds decreasing (strong winds from the WSW on Mon afternoon, calm by Wed morning). | ||||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | |||||||||||||||
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) | SW 14 | SSW 13 | S 12 | SSE 11 | SSE 10 | SE 12 | SW 9 | SSW 19 | SSW 18 | SSW 16 | SSW 16 | SSW 14 | S 14 | S 12 | S 12 | S 11 | SSE 11 | S 10 | SSW 10 | SE 10 | SE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 203 | 5222 | 7680 | 2651 | 1322 | 440 | 798 | 1273 | 3820 | 5437 | 5732 | 7797 | 3942 | 2246 | 1406 | 1301 | 619 | 578 | 173 | 184 | 115 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross | cross-off | cross-off | cross-off | cross | cross | off | cross-on | off | cross-off | cross | off |
High Tide | 4:16PM2.30m | 4:26AM2.29m | 4:51PM2.31m | 5:04AM2.31m | 5:28PM2.31m | 5:44AM2.31m | 6:07PM2.30m | 6:28AM2.29m | 6:51PM2.27m | 7:19AM2.26m | 7:44PM2.24m | 8:18AM2.24m | 8:46PM2.20m | ||||||||
Low Tide | 10:07AM0.77m | 10:22PM0.83m | 10:44AM0.77m | 11:00PM0.82m | 11:23AM0.78m | 11:40PM0.84m | 12:06PM0.82m | 00:24AM0.87m | 12:51PM0.88m | 1:12AM0.92m | 1:42PM0.94m | 2:07AM0.96m | 2:38PM1.00m | ||||||||
 | |  |  | |  | | |  |  |  |  | | | | |  | | | | | |
 | 8:03 | — | — | 8:02 | — | — | 8:00 | — | — | 8:00 | — | — | 7:58 | — | — | 7:56 | — | — | 7:54 | — | — |
 | — | 5:30 | — | — | 5:31 | — | — | 5:32 | — | — | 5:35 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — |
mm | 1 | 3 | 3 | — | — | 1 | — | — | — | 13 | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 8 | 5 | 6 | 7 | 7 | 10 | 10 | 12 | 11 | 8 | 8 | 7 | 8 | 8 | 7 | 6 | 7 | 5 | 4 | 5 | 5 |
Feels °C | 1 | -7 | -4 | 2 | 1 | 5 | 4 | 5 | 3 | 0 | -2 | -2 | 1 | 1 | 2 | 4 | 4 | 2 | 1 | 2 | 3 |
Swell 1 Height (m) Direction Period (s) | E 11 | E 11 | S 12 | SSE 11 | SSE 10 | SSW 9 | SE 12 | SSW 19 | SSW 18 | SE 12 | SE 12 | SSW 15 | S 14 | S 12 | S 12 | S 11 | SSE 11 | S 10 | SSW 10 | SE 10 | SE 10 |
| kJ | 154 | 86 | 5729 | 2651 | 1322 | 359 | 396 | 1273 | 3820 | 48 | 22 | 5538 | 3942 | 2246 | 1406 | 1301 | 619 | 578 | 173 | 184 | 115 |
Swell 2 Height (m) Direction Period (s) | SW 14 | ENE 9 | E 10 | E 10 | SW 12 | SE 12 | SW 9 | SSW 8 | SE 12 | — | NE 15 | — | — | SW 12 | S 15 | S 15 | SSW 11 | SE 10 | SE 11 | S 9 | S 8 |
| kJ | 203 | 31 | 34 | 19 | 74 | 440 | 192 | 217 | 132 | — | 8 | — | — | 1550 | 353 | 38 | 447 | 100 | 159 | 106 | 52 |
Swell 3 Height (m) Direction Period (s) | ENE 7 | SE 15 | — | S 21 | E 10 | SSW 19 | S 9 | SE 11 | SE 12 | — | — | — | — | NE 13 | S 16 | E 12 | SE 18 | ENE 5 | SSE 9 | SE 13 | SE 13 |
| kJ | 37 | 84 | — | 9 | 18 | 118 | 122 | 273 | 132 | — | — | — | — | 7 | 391 | 3 | 12 | 5 | 84 | 61 | 61 |
Wind waves Height (m) Direction Period (s) | W 3 | SSW 13 | S 12 | SW 10 | WSW 12 | WNW 3 | SW 9 | W 3 | WNW 3 | SSW 16 | SSW 16 | SSW 14 | — | — | — | — | — | — | NE 5 | ENE 4 | ENE 5 |
| kJ | 7 | 5222 | 7680 | 1450 | 1096 | 2 | 798 | 4 | 3 | 5437 | 5732 | 7797 | — | — | — | — | — | — | 6 | 15 | 46 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 152 | 406 | 293 | 21 | 57 | 21 | 21 | 57 | 61 | 161 | 399 | 263 | 256 | 293 | 8 | 0 | 8 | 0 | 0 | 0 | 0 |
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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