Surf Forecasts:
Catlins River Mouth surf forecast from 18 Jul 2026:
- Best quality surf: Saturday 18 Jul, 3PM (local time) - 10ft (3.0m), 17s period, SSW swell with offshore winds.
- Most powerful swell: Saturday 18 Jul, 3PM (local time) - 10ft (3.0m), 17s period, SSW swell with 5,625 kJ wave energy.
- Next surfable swell (1★+): Saturday 18 Jul, 3PM (local time) - 10ft (3.0m), 17s period with SSW 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 (Jul 18) at 3PM. The primary swell is predicted to be 3.0m and 17s period with a secondary swell of 1.2m and 14s. 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 3.0m 17s and forecast to arrive on Saturday (Jul 18) at 3PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Saturday (Jul 25) at 9AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Sat 18th Jul) | 10ft (3.0m) 17s |
| Best Surf | 3PM (Sat 18th Jul) | 10ft (3.0m) 17s |
| Most Powerful | 3PM (Sat 18th Jul) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Catlins River Mouth over the next 16 days.
Short Range ForecastLight rain (total 5mm), mostly falling on Sat night. Very mild (max 13°C on Sat afternoon, min 7°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Tue afternoon. Very mild (max 13°C on Tue afternoon, min 6°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||
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) | SSW 18 | SSW 17 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | S 16 | SSW 15 | S 13 | S 12 | SSW 12 | SSW 12 | SW 12 | SW 13 | SSW 13 | SW 14 | SW 13 | SW 14 | SSW 16 | SSW 17 | SSW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 7715 | 5625 | 3705 | 2648 | 2880 | 3578 | 3598 | 2512 | 1421 | 683 | 444 | 304 | 456 | 388 | 225 | 95 | 42 | 100 | 493 | 1108 | 1569 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross | cross-off | cross-off | cross-off | off | glassy | off | off | cross-off | cross-off | off | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off |
High Tide | 6:11PM2.44m | 6:32AM2.42m | 6:59PM2.36m | 7:26AM2.34m | 7:51PM2.28m | 8:23AM2.26m | 8:49PM2.21m | 9:23AM2.20m | 9:49PM2.16m | 10:24AM2.17m | 10:48PM2.14m | 11:21AM2.16m | 11:43PM2.14m | ||||||||
Low Tide | 12:00PM0.61m | 00:22AM0.76m | 12:51PM0.72m | 1:13AM0.86m | 1:42PM0.86m | 2:06AM0.96m | 2:34PM0.99m | 3:02AM1.05m | 3:29PM1.10m | 4:01AM1.11m | 4:27PM1.17m | 5:00AM1.13m | 5:28PM1.20m | ||||||||
 | |  |  |  |  | | |  | |  | | | | | | |  | |  | | |
 | 8:17 | — | — | 8:15 | — | — | 8:15 | — | — | 8:14 | — | — | 8:12 | — | — | 8:11 | — | — | 8:11 | — | — |
 | — | 5:16 | — | — | 5:17 | — | — | 5:19 | — | — | 5:20 | — | — | 5:21 | — | — | 5:22 | — | — | 5:22 | — |
mm | — | — | 5 | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 2 | 4 | 1 | — |
Temp °C | 12 | 13 | 11 | 9 | 10 | 9 | 9 | 9 | 7 | 11 | 13 | 10 | 10 | 11 | 8 | 9 | 11 | 9 | 7 | 7 | 4 |
Feels °C | 7 | 8 | 5 | 4 | 5 | 6 | 6 | 7 | 4 | 6 | 8 | 6 | 7 | 9 | 5 | 5 | 7 | 6 | 2 | 2 | 0 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | SSW 17 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | S 16 | SSW 15 | S 13 | S 12 | SSW 12 | SSW 12 | SW 12 | SW 13 | SSW 13 | SW 14 | SW 13 | ENE 6 | SSW 16 | SSW 17 | SSW 16 |
| kJ | 7715 | 5625 | 3705 | 2648 | 2880 | 3578 | 3598 | 2512 | 1421 | 683 | 444 | 304 | 456 | 388 | 225 | 95 | 42 | 18 | 493 | 1108 | 1569 |
Swell 2 Height (m) Direction Period (s) | ESE 15 | ESE 14 | ESE 14 | ESE 13 | ESE 13 | ESE 12 | ESE 12 | ESE 12 | ESE 12 | ESE 12 | ESE 11 | WSW 7 | ESE 11 | SE 11 | SW 12 | SSW 7 | ENE 5 | SW 14 | ENE 6 | SSW 7 | S 6 |
| kJ | 584 | 530 | 379 | 304 | 215 | 138 | 98 | 82 | 56 | 54 | 25 | 18 | 12 | 5 | 6 | 15 | 6 | 100 | 12 | 203 | 65 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | ESE 12 | — | — | — | — | — | ESE 11 | — | NE 6 | — | NE 5 | SSW 6 | SE 10 | SE 12 | ENE 6 | SE 13 |
| kJ | — | — | — | — | — | 178 | — | — | — | — | — | 12 | — | 1 | — | 7 | 8 | 27 | 22 | 8 | 42 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | NW 5 | — | — | — | NE 5 | ENE 5 | — | SSW 6 | SSW 8 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 24 | — | — | — | 17 | 17 | — | 145 | 336 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 57 | 0 | 8 | 8 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 8 | 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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