Surf Forecasts:
Stewart Island - Saber Reef surf forecast from 9 Sep 2026:
- Best quality surf: Saturday 12 Sep, 9AM (local time) - 25ft (7.5m), 16s period, SW swell with cross-onshore winds.
- Most powerful swell: Saturday 12 Sep, 9AM (local time) - 25ft (7.5m), 16s period, SW swell with 29,374 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 9AM (local time) - 25ft (7.5m), 16s period with SW swell.
Best Forecast Surf Conditions for Stewart Island - Saber Reef this week:
The surf forecast for Stewart Island - Saber Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 12) at 9AM. The primary swell is predicted to be 7.5m and 16s period with a secondary swell of 7.0m and 16s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Stewart Island - Saber Reef in the next 16 days are 7.5m 16s and forecast to arrive on Saturday (Sep 12) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 8.0m 16s period and expected on Saturday (Sep 12) at 12AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sat 12th Sep) | 25ft (7.5m) 16s |
| Best Surf | 9AM (Sat 12th Sep) | 25ft (7.5m) 16s |
| Most Powerful | 9AM (Sat 12th Sep) | 25ft (7.5m) 16s |
Table - best surf conditions forecast for Stewart Island - Saber Reef over the next 16 days.
Short Range ForecastHeavy rain (total 21mm), heaviest during Sat afternoon. Very mild (max 10°C on Thu night, min 6°C on Fri night). Winds increasing (fresh winds from the SW on Thu morning, near gales from the WSW by Fri night). | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Tue morning. Very mild (max 13°C on Mon night, min 8°C on Tue night). Mainly near gales. | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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 19 | ENE 9 | SSW 18 | SSW 18 | WSW 16 | WSW 16 | SW 16 | WSW 17 | S 11 | SW 15 | S 9 | S 9 | S 9 | WSW 14 | SSE 10 | S 9 | WNW 10 | ENE 7 | WSW 13 | SW 14 | WSW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 481 | 16 | 1016 | 427 | 0 | 0 | 29374 | 0 | 302 | 8519 | 436 | 139 | 57 | 0 | 18 | 6 | 0 | 4 | 0 | 3454 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross | cross |
High Tide | 12:19PM2.35m | 00:33AM2.40m | 1:02PM2.38m | 1:17AM2.42m | 1:43PM2.36m | 2:00AM2.38m | 2:23PM2.30m | 2:42AM2.30m | 3:03PM2.20m | 3:24AM2.18m | 3:43PM2.09m | 4:09AM2.05m | 4:26PM1.96m | ||||||||
Low Tide | 6:19PM0.10m | 6:42AM-0.06m | 7:02PM0.06m | 7:25AM-0.04m | 7:45PM0.06m | 8:07AM0.04m | 8:26PM0.13m | 8:49AM0.18m | 9:09PM0.23m | 9:32AM0.34m | 9:52PM0.37m | 10:17AM0.51m | 10:40PM0.52m | ||||||||
 |  |  | |  |  | |  | |  | | | | | | | | | | |  | |
 | 7:03 | — | — | 7:01 | — | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — |
 | — | 6:29 | — | — | 6:30 | — | — | 6:31 | — | — | 6:32 | — | — | 6:34 | — | — | 6:36 | — | — | 6:37 | — |
mm | 1 | — | 2 | 2 | 1 | 4 | 2 | 6 | 3 | — | — | 1 | — | — | 2 | 3 | 3 | 3 | 2 | 1 | 7 |
Temp °C | 8 | 9 | 10 | 10 | 9 | 7 | 8 | 10 | 10 | 10 | 10 | 10 | 11 | 12 | 13 | 13 | 10 | 9 | 9 | 9 | 10 |
Feels °C | -1 | 0 | -1 | -2 | -3 | -7 | -2 | -1 | -1 | 1 | 2 | 3 | 2 | 2 | 4 | 5 | 1 | -2 | 0 | -1 | -1 |
Swell 1 Height (m) Direction Period (s) | WSW 18 | WSW 18 | WSW 17 | SSW 18 | — | — | SW 16 | — | S 11 | WSW 15 | WSW 15 | S 9 | S 9 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | NW 10 | W 16 | SW 14 | — |
| kJ | 16432 | 20763 | 13416 | 427 | — | — | 29374 | — | 302 | 11207 | 7531 | 139 | 57 | 3257 | 1941 | 904 | 822 | 400 | 1355 | 3454 | — |
Swell 2 Height (m) Direction Period (s) | SSW 19 | ENE 9 | SSW 18 | — | — | — | — | — | — | — | S 9 | — | — | — | SSE 10 | S 9 | NE 5 | ENE 7 | — | — | — |
| kJ | 481 | 16 | 1016 | — | — | — | — | — | — | — | 436 | — | — | — | 18 | 6 | 7 | 4 | — | — | — |
Swell 3 Height (m) Direction Period (s) | ENE 9 | — | ENE 8 | — | — | — | — | — | — | — | — | — | — | — | E 12 | W 20 | — | — | — | — | — |
| kJ | 16 | — | 13 | — | — | — | — | — | — | — | — | — | — | — | 3 | 7 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | WSW 18 | WSW 16 | WSW 16 | WSW 16 | SW 16 | WSW 17 | WSW 16 | SW 15 | — | WSW 14 | WSW 15 | WNW 8 | WNW 8 | WNW 10 | WNW 10 | WSW 11 | WSW 13 | W 14 | WSW 14 |
| kJ | — | — | 19456 | 20975 | 24188 | 33455 | 25138 | 25178 | 17355 | 8519 | — | 6398 | 5626 | 822 | 1190 | 1484 | 2855 | 2757 | 7651 | 6808 | 16969 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 174 | 174 | 166 | 306 | 409 | 318 | 407 | 306 | 324 | 145 | 174 | 145 | 89 | 89 | 89 | 119 | 156 | 232 | 226 | 567 | 224 |
Best forecast wave conditions in Southland | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Information about the Stewart Island - Saber Reef Surf forecast
The above surf forecast table for Stewart Island - Saber Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Stewart Island - Saber Reef can be found by selecting the local surf guide option on the grey menu. Our Stewart Island - Saber Reef 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 (Stewart Island - Saber Reef) 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 Stewart Island - Saber Reef 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.
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