Surf Forecasts:
Catlins River Mouth surf forecast from 18 Aug 2026:
- Best quality surf: Monday 24 Aug, 6AM (local time) - 16ft (5.0m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 6AM (local time) - 16ft (5.0m), 15s period, SW swell with 10,553 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 12AM (local time) - 5.5ft (1.7m), 14s 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 Thursday (Aug 20) at 12AM. The primary swell is predicted to be 1.7m and 14s period with a secondary swell of 0.3m and 10s. 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 5.0m 15s and forecast to arrive on Monday (Aug 24) 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 5s period and expected on Wednesday (Aug 19) at 3PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Thu 20th Aug) | 5.5ft (1.7m) 14s |
| Best Surf | 6AM (Mon 24th Aug) | 16ft (5.0m) 15s |
| Most Powerful | 6AM (Mon 24th Aug) | 16ft (5.0m) 15s |
Table - best surf conditions forecast for Catlins River Mouth over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 12°C on Fri afternoon, min 7°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 21mm), heaviest during Sat night. Very mild (max 14°C on Sat afternoon, min 6°C on Sat night). Mainly strong winds. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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 | SSW 14 | SSW 14 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 10 | SW 13 | SSW 18 | SSW 16 | SSW 18 | SSW 13 | SSW 15 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2247 | 1704 | 1206 | 1479 | 1358 | 1136 | 264 | 173 | 109 | 109 | 153 | 243 | 680 | 3420 | 4414 | 2930 | 2325 | 1647 | 1227 | 1095 | 642 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-off |
High Tide | 7:59PM2.18m | 8:38AM2.17m | 9:01PM2.11m | 9:41AM2.12m | 10:07PM2.08m | 10:44AM2.10m | 11:08PM2.07m | 11:41AM2.11m | 00:02AM2.09m | 12:31PM2.14m | 00:50AM2.13m | 1:15PM2.18m | 1:32AM2.19m | ||||||||
Low Tide | 1:52PM1.07m | 2:18AM1.10m | 2:45PM1.17m | 3:18AM1.16m | 3:45PM1.24m | 4:22AM1.17m | 4:53PM1.24m | 5:24AM1.13m | 5:56PM1.18m | 6:19AM1.06m | 6:48PM1.09m | 7:06AM0.97m | 7:30PM0.99m | ||||||||
 | |  | | |  | |  | | | |  |  |  | | | | |  |  | | |
 | 7:35 | — | — | 7:33 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — | 7:26 | — | — | 7:24 | — | — |
 | — | 5:53 | — | — | 5:54 | — | — | 5:57 | — | — | 5:58 | — | — | 5:59 | — | — | 6:00 | — | — | 6:01 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 9 | 3 | 4 | 5 | — | — | — | — | 6 | 3 |
Temp °C | 9 | 10 | 8 | 10 | 11 | 9 | 9 | 12 | 10 | 12 | 14 | 10 | 7 | 8 | 11 | 13 | 13 | 13 | 13 | 9 | 7 |
Feels °C | 5 | 5 | 3 | 5 | 6 | 6 | 5 | 8 | 7 | 8 | 11 | 7 | -2 | 0 | 5 | 8 | 9 | 8 | 6 | 3 | 0 |
Swell 1 Height (m) Direction Period (s) | S 14 | SSW 14 | SSW 14 | SSW 16 | SSW 16 | SSW 15 | SSW 10 | SSW 10 | S 10 | S 9 | SSW 16 | SSW 18 | SSW 13 | SSW 15 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SW 13 |
| kJ | 2247 | 1704 | 1206 | 1479 | 1358 | 1136 | 227 | 173 | 94 | 27 | 153 | 243 | 680 | 3420 | 4414 | 2930 | 2325 | 1647 | 1227 | 1095 | 642 |
Swell 2 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | SSW 14 | SSW 14 | SW 13 | SSW 18 | S 9 | SW 7 | ESE 14 | ESE 14 | ESE 13 | ESE 12 | ESE 14 | ESE 14 | ESE 14 | ESE 14 | ESE 14 |
| kJ | 18 | 18 | 16 | 15 | 6 | 6 | 264 | 138 | 109 | 109 | 15 | 29 | 36 | 36 | 34 | 31 | 40 | 41 | 40 | 40 | 20 |
Swell 3 Height (m) Direction Period (s) | ESE 13 | ESE 13 | ESE 12 | ESE 11 | SE 13 | SE 12 | E 9 | E 8 | ENE 4 | SW 12 | ENE 5 | SSW 15 | NE 8 | — | — | — | — | — | — | ESE 14 | ENE 6 |
| kJ | 16 | 16 | 14 | 13 | 7 | 6 | 6 | 1 | 1 | 39 | 2 | 84 | 10 | — | — | — | — | — | — | 40 | 3 |
Wind waves Height (m) Direction Period (s) | — | WSW 5 | — | — | — | — | — | N 2 | — | — | — | — | SW 10 | WNW 3 | W 4 | — | W 4 | — | N 3 | — | — |
| kJ | — | 80 | — | — | — | — | — | 1 | — | — | — | — | 585 | 7 | 17 | — | 6 | — | 5 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 8 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 399 | 256 | 147 | 57 | 0 | 0 | 57 | 104 | 406 |
Best forecast wave conditions in Catlins | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Catlins River Mouth surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest