Surf Forecasts:
Stewart Island - Saber Reef surf forecast from 11 Sep 2026:
- Best quality surf: Friday 18 Sep, 3AM (local time) - 18ft (5.5m), 15s period, SW swell with cross-shore winds.
- Most powerful swell: Friday 18 Sep, 3AM (local time) - 18ft (5.5m), 15s period, SW swell with 14,745 kJ wave energy.
- Next surfable swell (1★+): Friday 18 Sep, 3AM (local time) - 18ft (5.5m), 15s 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 Friday (Sep 18) at 3AM. The primary swell is predicted to be 5.5m and 15s period with a secondary swell of 0.3m 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 5.5m 15s and forecast to arrive on Friday (Sep 18) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 7.5m 17s period and expected on Saturday (Sep 12) at 3PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 18th Sep) | 18ft (5.5m) 15s |
| Best Surf | 3AM (Fri 18th Sep) | 18ft (5.5m) 15s |
| Most Powerful | 3AM (Fri 18th Sep) | 18ft (5.5m) 15s |
Table - best surf conditions forecast for Stewart Island - Saber Reef over the next 16 days.
Short Range ForecastLight rain (total 9mm), mostly falling on Sat afternoon. Very mild (max 13°C on Mon night, min 7°C on Sat morning). Winds decreasing (near gales from the W on Sat afternoon, fresh winds from the W by Sun afternoon). | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Tue night. Very mild (max 15°C on Tue morning, min 7°C on Wed night). Mainly strong winds. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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) | SW 16 | WSW 17 | WSW 16 | WSW 15 | WSW 15 | S 10 | S 9 | S 9 | SSE 8 | SE 9 | E 11 | WSW 12 | WSW 13 | WSW 13 | E 15 | ESE 14 | ESE 14 | ESE 14 | SW 15 | SW 15 | ESE 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 24113 | 0 | 0 | 0 | 0 | 186 | 123 | 39 | 22 | 3 | 2 | 0 | 0 | 0 | 17 | 18 | 18 | 36 | 12563 | 8693 | 32 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross |
High Tide | 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 | 4:57AM1.91m | 5:15PM1.83m | 5:53AM1.80m | 6:13PM1.74m | ||||||||
Low Tide | 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 | 11:08AM0.67m | 11:36PM0.65m | 12:10PM0.80m | 00:41AM0.74m | ||||||||
 | |  |  |  | |  | |  |  | |  | | | | | | | | | | |
 | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — |
 | — | 6:31 | — | — | 6:32 | — | — | 6:34 | — | — | 6:36 | — | — | 6:37 | — | — | 6:37 | — | — | 6:38 | — |
mm | 2 | 2 | 3 | — | 1 | 1 | — | — | — | — | — | 14 | — | 2 | 1 | — | 2 | — | — | — | 7 |
Temp °C | 8 | 10 | 10 | 10 | 10 | 10 | 11 | 12 | 13 | 15 | 15 | 12 | 10 | 9 | 8 | 8 | 9 | 9 | 10 | 10 | 10 |
Feels °C | -2 | -2 | -2 | 2 | 3 | 3 | 2 | 3 | 5 | 6 | 9 | 5 | 2 | 1 | 1 | -1 | 0 | 2 | 1 | -1 | 1 |
Swell 1 Height (m) Direction Period (s) | SW 16 | WSW 17 | — | WSW 15 | WSW 15 | WSW 14 | S 9 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | WNW 10 | WSW 13 | WSW 13 | WSW 14 | ESE 14 | ESE 14 | ESE 14 | SW 15 | SW 15 | ESE 13 |
| kJ | 24113 | 24717 | — | 11928 | 9217 | 6587 | 113 | 2989 | 1598 | 998 | 937 | 1611 | 3042 | 3718 | 5682 | 18 | 18 | 36 | 12563 | 8693 | 16 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | S 10 | S 9 | S 9 | SSE 8 | SE 9 | E 11 | WSW 12 | NW 10 | — | E 15 | E 13 | — | — | ESE 13 | ESE 13 | ESE 13 |
| kJ | — | — | — | — | — | 186 | 123 | 39 | 22 | 3 | 2 | 1381 | 245 | — | 17 | 14 | — | — | 16 | 16 | 32 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | E 12 | W 20 | S 9 | NE 5 | W 16 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 3 | 7 | 2 | 6 | 20 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 16 | WSW 17 | WSW 16 | — | — | WSW 14 | WSW 15 | WNW 8 | WNW 8 | WNW 8 | WNW 10 | WNW 11 | — | NW 9 | — | WSW 14 | WSW 16 | SW 15 | — | WNW 8 | W 14 |
| kJ | 28489 | 30022 | 20966 | — | — | 8132 | 5337 | 791 | 821 | 1408 | 3271 | 668 | — | 314 | — | 5397 | 12216 | 16345 | — | 743 | 12280 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 406 | 318 | 318 | 145 | 119 | 119 | 89 | 89 | 89 | 89 | 89 | 89 | 145 | 145 | 176 | 92 | 145 | 145 | 119 | 145 | 119 |
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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