Surf Forecasts:
Stewart Island - Saber Reef surf forecast from 12 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 6AM (local time) - 7ft (2.1m), 14s period, SW swell with 1,712 kJ wave energy.
Best Forecast Surf Conditions for Stewart Island - Saber Reef this week:
The most powerful waves expected at Stewart Island - Saber Reef in the next 16 days are 2.1m 14s and forecast to arrive on Thursday (Sep 17) at 6AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 5.0m 15s period and expected on Sunday (Sep 13) at 12PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6AM (Thu 17th Sep) | 7ft (2.1m) 14s |
Table - best surf conditions forecast for Stewart Island - Saber Reef over the next 16 days.
Short Range ForecastHeavy rain (total 26mm), heaviest during Tue night. Very mild (max 15°C on Tue morning, min 9°C on Sun morning). Winds decreasing (strong winds from the NW on Mon night, moderate winds from the W by Tue night). | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Fri night. Very mild (max 11°C on Fri morning, min 7°C on Wed night). Winds increasing (light winds from the SW on Wed night, strong winds from the WNW by Fri morning). | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||
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) | WSW 15 | S 10 | S 10 | S 9 | S 9 | SSE 8 | S 8 | E 11 | E 11 | WSW 12 | WSW 14 | ESE 15 | ESE 14 | ESE 13 | ESE 12 | ESE 13 | ESE 13 | ESE 13 | ESE 12 | ESE 12 | SE 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 418 | 320 | 108 | 39 | 13 | 6 | 2 | 2 | 0 | 0 | 22 | 19 | 17 | 31 | 67 | 62 | 65 | 57 | 56 | 31 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | on | cross-on | cross | cross | cross | cross | cross | cross-off | cross-off | glassy |
High Tide | 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 | 7:00AM1.73m | 7:22PM1.69m | ||||||||
Low Tide | 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 | 1:21PM0.85m | 1:52AM0.76m | ||||||||
 |  |  | |  | |  | |  | | | | | | | | |  | | |  | |
 | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — | 6:45 | — | — |
 | — | 6:32 | — | — | 6:34 | — | — | 6:36 | — | — | 6:37 | — | — | 6:37 | — | — | 6:38 | — | — | 6:40 | — |
mm | — | 1 | — | — | — | — | — | 2 | 23 | — | — | — | — | — | — | 1 | 3 | 8 | 5 | 1 | — |
Temp °C | 10 | 10 | 10 | 11 | 13 | 13 | 15 | 15 | 12 | 9 | 9 | 8 | 9 | 9 | 10 | 11 | 10 | 11 | 11 | 11 | 11 |
Feels °C | 2 | 3 | 2 | 2 | 5 | 5 | 8 | 8 | 6 | 2 | 2 | 3 | 2 | 2 | 3 | 2 | 2 | 5 | 4 | 7 | 9 |
Swell 1 Height (m) Direction Period (s) | WSW 15 | WSW 15 | S 10 | WSW 15 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 14 | WSW 14 | WSW 16 | WSW 16 | ESE 12 | ESE 13 | WSW 14 | WSW 15 | WSW 15 | WSW 15 | SE 11 |
| kJ | 11928 | 8427 | 216 | 4117 | 2989 | 1710 | 998 | 968 | 1098 | 2707 | 4765 | 3786 | 6370 | 7211 | 31 | 67 | 11197 | 10211 | 8241 | 7375 | 31 |
Swell 2 Height (m) Direction Period (s) | — | S 10 | S 10 | S 9 | S 9 | SSE 8 | S 8 | E 11 | WNW 11 | NW 10 | NW 9 | NW 9 | NW 9 | ESE 13 | — | — | ESE 13 | ESE 13 | ESE 12 | ESE 12 | — |
| kJ | — | 418 | 320 | 108 | 39 | 13 | 6 | 2 | 256 | 211 | 101 | 29 | 29 | 17 | — | — | 62 | 65 | 57 | 56 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | E 12 | SE 11 | S 9 | E 11 | W 16 | — | ESE 15 | ESE 14 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 3 | 5 | 2 | 2 | 20 | — | 22 | 19 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | WSW 14 | WNW 7 | WNW 8 | WNW 8 | WNW 8 | WNW 10 | WNW 10 | — | — | — | — | — | WSW 15 | WSW 14 | — | — | — | WNW 5 | WSW 14 |
| kJ | — | — | 6444 | 342 | 750 | 843 | 1276 | 2542 | 1156 | — | — | — | — | — | 7044 | 10358 | — | — | — | 64 | 7739 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 145 | 145 | 119 | 89 | 89 | 89 | 89 | 89 | 145 | 145 | 145 | 90 | 90 | 145 | 89 | 119 | 145 | 92 | 95 | 89 | 92 |
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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