Surf Forecasts:
Colac Bay surf forecast from 18 Sep 2026:
- Best quality surf: Friday 18 Sep, 3PM (local time) - 10ft (3.0m), 15s period, WSW swell with offshore winds.
- Most powerful swell: Sunday 20 Sep, 9AM (local time) - 10ft (3.0m), 17s period, WSW swell with 5,974 kJ wave energy.
- Next surfable swell (1★+): Friday 18 Sep, 3PM (local time) - 10ft (3.0m), 15s period with WSW swell.
Best Forecast Surf Conditions for Colac Bay this week:
The surf forecast for Colac Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 18) at 3PM. The primary swell is predicted to be 3.0m and 15s period with a secondary swell of 0.1m and 16s. Another secondary swell of 0.3m and 12s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Colac Bay in the next 16 days are 3.0m 17s and forecast to arrive on Sunday (Sep 20) at 9AM. 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 4s period and expected on Monday (Sep 21) at 12PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Fri 18th Sep) | 10ft (3.0m) 15s |
| Best Surf | 3PM (Fri 18th Sep) | 10ft (3.0m) 15s |
| Most Powerful | 9AM (Sun 20th Sep) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Colac Bay over the next 16 days.
Short Range ForecastHeavy rain (total 31mm), heaviest during Fri night. Very mild (max 12°C on Sat morning, min 6°C on Sat afternoon). Winds decreasing (near gales from the WSW on Sat night, light winds from the NNW by Sun night). | Days 4-6 Weather SummaryHeavy rain (total 22mm), heaviest during Mon afternoon. Very mild (max 17°C on Mon afternoon, min 6°C on Tue night). Winds decreasing (fresh winds from the WSW on Mon afternoon, light winds from the W by Wed night). | ||||||||||||||||||||
Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 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) | W 15 | WSW 15 | WSW 15 | W 14 | W 14 | WSW 14 | WSW 17 | WSW 16 | WSW 15 | W 14 | W 12 | WSW 14 | WSW 15 | W 15 | WSW 15 | WSW 15 | WSW 15 | WSW 15 | WSW 14 | WSW 14 | WSW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4167 | 3771 | 3241 | 3728 | 4280 | 4691 | 5974 | 5275 | 3675 | 2308 | 1927 | 3469 | 3427 | 4437 | 4766 | 3691 | 3724 | 2664 | 1895 | 1680 | 1233 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | off | cross-off | cross-off | cross-off | off | cross-off | off | cross-off | off | cross-off | cross-off | cross | cross | cross-off | cross-off | cross-off | off |
High Tide | 6:26PM2.01m | 7:09AM2.01m | 7:35PM1.95m | 8:15AM1.98m | 8:41PM1.95m | 9:14AM2.00m | 9:37PM1.99m | 10:06AM2.05m | 10:26PM2.07m | 10:51AM2.13m | 11:08PM2.17m | 11:32AM2.22m | 11:47PM2.28m | ||||||||
Low Tide | 12:22PM0.95m | 00:53AM0.90m | 1:22PM1.00m | 1:59AM0.90m | 2:30PM0.98m | 3:03AM0.85m | 3:35PM0.90m | 3:59AM0.75m | 4:28PM0.78m | 4:47AM0.64m | 5:11PM0.65m | 5:29AM0.53m | 5:49PM0.53m | ||||||||
 |  |  | | |  | |  |  |  |  | | | | | | | | | |  | |
 | 6:46 | — | — | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — |
 | — | 6:38 | — | — | 6:39 | — | — | 6:42 | — | — | 6:43 | — | — | 6:44 | — | — | 6:45 | — | — | 6:46 | — |
mm | 4 | 1 | 10 | 4 | 5 | 5 | 2 | — | — | — | 6 | 1 | — | 4 | 6 | 2 | 1 | 2 | 1 | — | — |
Temp °C | 11 | 11 | 11 | 12 | 11 | 7 | 8 | 9 | 8 | 15 | 17 | 9 | 10 | 7 | 7 | 8 | 8 | 8 | 10 | 10 | 9 |
Feels °C | 5 | 6 | 5 | 5 | 2 | -4 | -1 | 1 | 3 | 9 | 12 | 1 | 2 | -1 | -2 | 1 | 1 | 3 | 5 | 4 | 5 |
Swell 1 Height (m) Direction Period (s) | S 15 | S 16 | WSW 15 | S 18 | — | SE 11 | — | S 16 | S 14 | W 14 | — | S 17 | S 16 | S 17 | S 16 | SE 11 | S 17 | S 17 | S 16 | S 16 | S 16 |
| kJ | 5 | 5 | 3241 | 6 | — | 19 | — | 2088 | 4 | 2308 | — | 217 | 5 | 6 | 605 | 5 | 6 | 5 | 5 | 5 | 5 |
Swell 2 Height (m) Direction Period (s) | SE 13 | SE 12 | S 15 | SSE 10 | S 10 | NW 5 | — | — | S 14 | S 10 | S 17 | SSE 10 | S 9 | — | SE 11 | — | S 15 | S 16 | S 16 | S 9 | SSE 9 |
| kJ | 27 | 24 | 4 | 35 | 30 | 1 | — | — | 250 | 2 | 23 | 34 | 27 | — | 5 | — | 70 | 84 | 181 | 44 | 26 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SE 12 | SE 12 | — | — | — | — | S 18 | SW 13 | — | SE 13 | — | — | — | SSE 18 | SE 11 | SE 11 | SE 10 | SE 10 |
| kJ | — | — | — | 22 | 22 | — | — | — | — | 25 | 7 | — | 7 | — | — | — | 63 | 4 | 4 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | W 15 | WSW 15 | — | W 14 | W 14 | WSW 14 | WSW 17 | WSW 16 | WSW 15 | — | W 12 | WSW 14 | WSW 15 | W 15 | WSW 15 | WSW 15 | WSW 15 | WSW 15 | WSW 14 | WSW 14 | WSW 14 |
| kJ | 4167 | 3771 | — | 3728 | 4280 | 4691 | 5974 | 5275 | 3675 | — | 1927 | 3469 | 3427 | 4437 | 4766 | 3691 | 3724 | 2664 | 1895 | 1680 | 1233 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 180 | 44 | 44 | 141 | 180 | 502 | 618 | 1073 | 11 | 182 | 134 | 146 | 124 | 141 | 180 | 146 | 503 | 44 | 44 | 124 | 0 |
Best forecast wave conditions in Southland | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Colac Bay 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 Colac Bay Surf forecast
The above surf forecast table for Colac Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Colac Bay can be found by selecting the local surf guide option on the grey menu. Our Colac Bay 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 (Colac Bay) 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 Colac Bay 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.
Colac Bay is 30 km (19 miles) from Tuatapere. If you plan a holiday in Southland, look for hotels and other accommodation in Tuatapere. Tuatapere has rooms for a wide range of budgets as well as car hire and transport links.
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