Surf Forecasts:
Stewart Island - Saber Reef surf forecast from 20 Aug 2026:
- Best quality surf: Thursday 27 Aug, 6AM (local time) - 15ft (4.5m), 14s period, SW swell with cross-shore winds.
- Most powerful swell: Thursday 27 Aug, 3AM (local time) - 15ft (4.5m), 14s period, SW swell with 7,714 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 6AM (local time) - 15ft (4.5m), 14s 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 Thursday (Aug 27) at 6AM. The primary swell is predicted to be 4.5m and 14s period with a secondary swell of 0.2m and 13s. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Stewart Island - Saber Reef in the next 16 days are 4.5m 14s and forecast to arrive on Thursday (Aug 27) at 3AM. 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 14s period and expected on Sunday (Aug 23) at 12PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Thu 27th Aug) | 15ft (4.5m) 14s |
| Best Surf | 6AM (Thu 27th Aug) | 15ft (4.5m) 14s |
| Most Powerful | 3AM (Thu 27th Aug) | 15ft (4.5m) 14s |
Table - best surf conditions forecast for Stewart Island - Saber Reef over the next 16 days.
Short Range ForecastHeavy rain (total 30mm), heaviest during Sat night. Very mild (max 13°C on Sat afternoon, min 6°C on Sun morning). Winds increasing (moderate winds from the NNW on Fri morning, severe gales from the WSW by Sun morning). | Days 4-6 Weather SummaryHeavy rain (total 21mm), heaviest during Tue night. Very mild (max 12°C on Mon afternoon, min 7°C on Wed night). Winds decreasing (gales from the NW on Mon night, moderate winds from the SSE by Wed night). | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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 9 | S 10 | S 10 | S 9 | SSE 9 | E 15 | E 14 | E 14 | E 14 | ESE 14 | ESE 14 | ESE 14 | ESE 14 | ESE 14 | ESE 13 | ESE 14 | ESE 14 | SW 14 | SW 14 | SW 14 | SW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 42 | 44 | 31 | 27 | 16 | 17 | 34 | 33 | 33 | 19 | 19 | 20 | 20 | 19 | 17 | 20 | 19 | 7563 | 6156 | 3442 | 1584 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross | cross | cross-off | cross | cross-off | cross-on | cross-on | cross-on | on | cross-off | cross-off | cross-off |
High Tide | 8:01PM1.73m | 8:49AM1.75m | 9:09PM1.74m | 9:52AM1.80m | 10:07PM1.80m | 10:43AM1.87m | 10:54PM1.89m | 11:25AM1.96m | 11:34PM1.98m | 12:02PM2.04m | 00:10AM2.07m | 12:37PM2.11m | 00:46AM2.14m | ||||||||
Low Tide | 1:56PM0.80m | 2:28AM0.72m | 3:02PM0.80m | 3:29AM0.68m | 3:58PM0.74m | 4:20AM0.60m | 4:45PM0.65m | 5:04AM0.49m | 5:26PM0.55m | 5:43AM0.38m | 6:03PM0.45m | 6:20AM0.28m | 6:38PM0.36m | ||||||||
 | |  |  |  |  | | | |  | |  | | |  | | |  | | | | |
 | 7:41 | — | — | 7:39 | — | — | 7:37 | — | — | 7:35 | — | — | 7:33 | — | — | 7:31 | — | — | 7:30 | — | — |
 | — | 6:02 | — | — | 6:04 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:10 | — |
mm | — | — | 2 | — | 2 | 15 | 4 | 4 | 3 | 2 | 1 | 8 | — | 4 | 6 | — | — | — | — | — | 4 |
Temp °C | 10 | 12 | 12 | 12 | 13 | 11 | 7 | 7 | 10 | 11 | 12 | 12 | 11 | 12 | 11 | 9 | 9 | 8 | 6 | 7 | 7 |
Feels °C | 3 | 3 | 4 | 3 | 5 | 1 | -8 | -7 | -1 | 1 | 0 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | -1 | -3 | 1 |
Swell 1 Height (m) Direction Period (s) | WSW 14 | WSW 13 | WNW 11 | WSW 12 | WSW 16 | WSW 14 | E 14 | E 14 | E 14 | ESE 14 | ESE 14 | ESE 14 | ESE 14 | ESE 14 | ESE 13 | ESE 14 | ESE 14 | SW 14 | SW 14 | SW 14 | SW 13 |
| kJ | 999 | 396 | 2160 | 256 | 505 | 660 | 34 | 33 | 33 | 19 | 19 | 20 | 20 | 19 | 17 | 20 | 19 | 7563 | 6156 | 3442 | 1584 |
Swell 2 Height (m) Direction Period (s) | S 9 | S 10 | WSW 13 | WSW 16 | WSW 12 | WSW 18 | — | — | — | — | — | — | — | — | — | — | — | ESE 13 | SE 13 | S 12 | E 7 |
| kJ | 42 | 44 | 431 | 237 | 195 | 413 | — | — | — | — | — | — | — | — | — | — | — | 17 | 6 | 607 | 200 |
Swell 3 Height (m) Direction Period (s) | E 9 | E 11 | S 10 | S 9 | SSE 9 | E 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 11 |
| kJ | 2 | 9 | 31 | 27 | 16 | 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 319 |
Wind waves Height (m) Direction Period (s) | WNW 7 | WNW 9 | WNW 11 | WNW 11 | WNW 9 | WNW 9 | W 12 | WSW 14 | WSW 14 | W 15 | W 15 | W 14 | W 14 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | — | — | E 5 | ENE 7 |
| kJ | 372 | 1875 | 3897 | 1985 | 1479 | 1602 | 13939 | 25469 | 17930 | 15262 | 16271 | 12657 | 11605 | 13102 | 9819 | 8121 | 7120 | — | — | 102 | 456 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 95 | 89 | 95 | 89 | 89 | 89 | 722 | 769 | 406 | 221 | 166 | 224 | 221 | 166 | 306 | 145 | 145 | 90 | 382 | 406 | 90 |
Best forecast wave conditions in Southland | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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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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