Surf Forecasts:
Stewart Island - Saber Reef surf forecast from 20 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 6PM (local time) - 10ft (3.0m), 12s period, SW swell with glassy winds.
- Most powerful swell: Wednesday 26 Aug, 6PM (local time) - 10ft (3.0m), 12s period, SW swell with 2,387 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 6PM (local time) - 10ft (3.0m), 12s 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 Wednesday (Aug 26) at 6PM. The primary swell is predicted to be 3.0m and 12s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Stewart Island - Saber Reef in the next 16 days are 3.0m 12s and forecast to arrive on Wednesday (Aug 26) at 6PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 9.0m 15s period and expected on Sunday (Aug 23) at 3PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Wed 26th Aug) | 10ft (3.0m) 12s |
| Best Surf | 6PM (Wed 26th Aug) | 10ft (3.0m) 12s |
| Most Powerful | 6PM (Wed 26th Aug) | 10ft (3.0m) 12s |
Table - best surf conditions forecast for Stewart Island - Saber Reef over the next 16 days.
Short Range ForecastHeavy rain (total 33mm), heaviest during Sat night. Very mild (max 12°C on Fri afternoon, min 7°C on Sat night). Winds increasing (moderate winds from the W on Thu afternoon, gales from the W by Sat night). | Days 5-7 Weather SummaryHeavy rain (total 22mm), heaviest during Tue night. Very mild (max 12°C on Mon night, min 5°C on Sun afternoon). Winds decreasing (gales from the W on Sun afternoon, light winds from the WSW by Wed morning). | |||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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) | SW 15 | E 9 | S 9 | S 10 | SSE 10 | S 9 | SSE 9 | SSE 8 | E 14 | WSW 15 | E 14 | ESE 14 | ESE 14 | ESE 14 | ESE 14 | ESE 14 | ESE 14 | ESE 14 | ESE 14 | WSW 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 2614 | 6 | 42 | 44 | 33 | 27 | 16 | 14 | 60 | 0 | 33 | 37 | 40 | 21 | 20 | 38 | 19 | 38 | 19 | 0 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross | cross-off | cross | cross-off | cross-off | cross-on | cross-on | cross-on | cross-off |
High Tide | 6:55PM1.78m | 7:39AM1.75m | 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 | |||||||
Low Tide | 1:22AM0.69m | 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 | ||||||||
 |  | |  |  |  | |  | |  |  | | | | | | |  | | | |
 | — | — | 7:41 | — | — | 7:39 | — | — | 7:37 | — | — | 7:35 | — | — | 7:33 | — | — | 7:31 | — | — |
 | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — |
mm | — | — | — | 1 | 2 | 1 | 4 | 21 | 4 | 4 | 3 | 2 | 2 | 3 | 2 | 2 | 4 | — | — | 2 |
Temp °C | 10 | 10 | 11 | 12 | 12 | 12 | 12 | 10 | 7 | 6 | 10 | 11 | 11 | 12 | 12 | 12 | 12 | 9 | 8 | 8 |
Feels °C | 3 | 4 | 3 | 3 | 1 | 3 | 2 | 4 | -8 | -8 | -1 | -1 | -2 | 0 | 1 | 1 | 1 | 1 | 4 | 3 |
Swell 1 Height (m) Direction Period (s) | SW 15 | WSW 14 | WSW 14 | WSW 13 | WNW 11 | WSW 13 | WSW 16 | WSW 14 | E 14 | — | E 14 | ESE 14 | ESE 14 | ESE 14 | ESE 14 | ESE 14 | WSW 14 | WSW 20 | NW 9 | WSW 12 |
| kJ | 2614 | 2661 | 999 | 396 | 2581 | 294 | 463 | 602 | 60 | — | 33 | 37 | 20 | 21 | 20 | 19 | 4832 | 127 | 144 | 2321 |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | S 9 | S 10 | SSE 10 | WSW 17 | SSE 9 | WSW 18 | — | — | — | — | ESE 14 | — | — | ESE 14 | ESE 14 | ESE 13 | WSW 17 | WSW 16 |
| kJ | 7 | 6 | 42 | 44 | 33 | 243 | 16 | 408 | — | — | — | — | 40 | — | — | 38 | 19 | 16 | 404 | 437 |
Swell 3 Height (m) Direction Period (s) | SE 13 | SE 12 | E 9 | E 11 | E 11 | S 9 | S 19 | SSE 8 | — | — | — | — | — | — | — | — | — | ESE 14 | ESE 14 | NW 9 |
| kJ | 7 | 6 | 2 | 9 | 9 | 27 | 7 | 14 | — | — | — | — | — | — | — | — | — | 38 | 19 | 28 |
Wind waves Height (m) Direction Period (s) | W 6 | — | NW 7 | WNW 9 | N 5 | WNW 10 | WNW 10 | WNW 9 | W 12 | WSW 15 | WSW 15 | WSW 15 | W 15 | W 14 | WSW 14 | WSW 14 | NW 9 | WSW 13 | WSW 13 | — |
| kJ | 72 | — | 489 | 1874 | 12 | 1732 | 2436 | 729 | 13097 | 34172 | 20614 | 14241 | 13919 | 12513 | 8262 | 8685 | 1927 | 4749 | 3141 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 145 | 89 | 95 | 89 | 95 | 89 | 92 | 156 | 718 | 718 | 560 | 226 | 92 | 166 | 166 | 166 | 318 | 145 | 98 | 98 |
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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