Surf Forecasts:
Stewart Island - Saber Reef surf forecast from 11 Aug 2026:
- Best quality surf: Sunday 16 Aug, 12PM (local time) - 11ft (3.5m), 15s period, SW swell with cross-shore winds.
- Most powerful swell: Tuesday 18 Aug, 6PM (local time) - 15ft (4.5m), 16s period, SW swell with 11,133 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 6PM (local time) - 7.5ft (2.3m), 9s period with ENE 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 12) at 6PM. The primary swell is predicted to be 2.3m and 9s period with a secondary swell of 1.8m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Stewart Island - Saber Reef in the next 16 days are 4.5m 16s and forecast to arrive on Tuesday (Aug 18) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 5.0m 16s period and expected on Saturday (Aug 15) at 9AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Wed 12th Aug) | 7.5ft (2.3m) 9s |
| Best Surf | 12PM (Sun 16th Aug) | 11ft (3.5m) 15s |
| Most Powerful | 6PM (Tue 18th Aug) | 15ft (4.5m) 16s |
Table - best surf conditions forecast for Stewart Island - Saber Reef over the next 16 days.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu night. Very mild (max 12°C on Wed night, min 8°C on Tue night). Winds increasing (light winds from the ENE on Tue night, fresh winds from the WNW by Thu night). | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Fri night. Very mild (max 10°C on Fri night, min 6°C on Fri night). Winds decreasing (fresh winds from the WNW on Fri night, light winds from the WSW by Sat night). | ||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
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) | E 7 | E 8 | E 9 | E 10 | E 9 | E 9 | E 9 | E 8 | SSW 18 | E 8 | E 8 | E 8 | ESE 13 | E 13 | SW 14 | SW 14 | S 8 | ESE 15 | SW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 215 | 245 | 509 | 460 | 202 | 130 | 96 | 66 | 110 | 28 | 35 | 31 | 17 | 30 | 7140 | 5165 | 74 | 22 | 2831 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross | cross | cross | cross | on | on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on |
High Tide | 00:00AM2.33m | 12:37PM2.39m | 00:51AM2.42m | 1:25PM2.43m | 1:39AM2.46m | 2:11PM2.42m | 2:26AM2.44m | 2:55PM2.36m | 3:12AM2.36m | 3:39PM2.26m | 3:58AM2.23m | 4:22PM2.13m | |||||||
Low Tide | 6:13AM-0.03m | 6:38PM0.12m | 7:02AM-0.11m | 7:25PM0.06m | 7:50AM-0.12m | 8:11PM0.06m | 8:36AM-0.05m | 8:57PM0.10m | 9:21AM0.07m | 9:43PM0.20m | 10:07AM0.23m | 10:30PM0.33m | |||||||
 |  | | |  | |  |  |  |  | |  | | | | | | | | |
 | — | 7:56 | — | — | 7:54 | — | — | 7:52 | — | — | 7:50 | — | — | 7:48 | — | — | 7:48 | — | — |
 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:54 | — | — | 5:57 | — | — | 5:58 | — |
mm | — | — | — | — | — | — | 1 | 2 | — | 8 | — | 1 | — | — | 1 | — | 1 | — | 2 |
Temp °C | 9 | 10 | 10 | 12 | 12 | 12 | 11 | 10 | 10 | 10 | 8 | 7 | 8 | 9 | 10 | 9 | 10 | 9 | 10 |
Feels °C | 6 | 4 | 5 | 7 | 8 | 7 | 4 | 7 | 4 | 2 | 1 | 1 | 2 | 3 | 6 | 3 | 5 | 1 | 3 |
Swell 1 Height (m) Direction Period (s) | E 7 | NW 13 | WSW 17 | E 10 | WSW 16 | WSW 16 | WSW 15 | WSW 14 | WSW 16 | WSW 15 | WSW 16 | WSW 16 | WSW 15 | E 13 | SW 14 | SW 14 | WSW 13 | ESE 15 | ESE 14 |
| kJ | 130 | 269 | 1133 | 460 | 1834 | 1766 | 1337 | 2993 | 8111 | 8427 | 11471 | 10251 | 7440 | 30 | 7140 | 5165 | 2805 | 22 | 20 |
Swell 2 Height (m) Direction Period (s) | WSW 15 | WSW 18 | NW 12 | WSW 16 | E 9 | E 9 | E 9 | WSW 18 | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 7 | E 12 | E 12 | S 8 | E 8 | E 8 |
| kJ | 449 | 525 | 256 | 1170 | 202 | 130 | 96 | 1302 | 63 | 28 | 35 | 31 | 10 | 11 | 28 | 11 | 74 | 6 | 1 |
Swell 3 Height (m) Direction Period (s) | NW 10 | WSW 14 | S 9 | NW 11 | NW 10 | NW 10 | ESE 13 | E 8 | SSW 18 | ESE 14 | ESE 14 | ESE 13 | ESE 13 | ESE 13 | ESE 12 | SE 16 | E 12 | NE 8 | NE 9 |
| kJ | 51 | 290 | 2 | 140 | 39 | 65 | 17 | 66 | 110 | 19 | 20 | 17 | 17 | 17 | 15 | 10 | 11 | 3 | 3 |
Wind waves Height (m) Direction Period (s) | E 7 | E 8 | E 9 | — | WNW 7 | WNW 6 | WNW 8 | — | — | WNW 5 | — | — | — | WSW 15 | — | — | W 3 | WSW 13 | SW 12 |
| kJ | 215 | 245 | 509 | — | 153 | 96 | 385 | — | — | 93 | — | — | — | 7021 | — | — | 8 | 2573 | 2831 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 94 | 89 | 0 | 89 | 89 | 89 | 89 | 92 | 95 | 90 | 90 | 90 | 95 | 89 | 145 | 92 | 145 | 176 |
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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