Dunedin - St Clair Surf Break

Lat Long: 45.91° S 170.50° E

Dunedin - St Clair Surf Forecast and Surf Report

Issued: 11 pm 02 Aug 2026 (local time)

Forecast update in  hr  min

Today's Dunedin - St Clair sea temperature is
10.3° C
1.5° 

Dunedin - St Clair surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Dunedin - St Clair surf forecast from 2 Aug 2026:

  • Best quality surf: Monday 3 Aug, 12PM (local time) - 10ft (3.0m), 14s period, SSW swell with cross-shore winds.
  • Most powerful swell: Tuesday 4 Aug, 3PM (local time) - 13ft (4.0m), 12s period, S swell with 4,777 kJ wave energy.
  • Next surfable swell (1★+): Monday 3 Aug, 12PM (local time) - 10ft (3.0m), 14s period with SSW swell.

Best Forecast Surf Conditions for Dunedin - St Clair this week:

The surf forecast for Dunedin - St Clair over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 03) at 12PM. The primary swell is predicted to be 3.0m and 14s period with a secondary swell of 0.4m and 12s. Another secondary swell of 0.1m and 15s is also forecast. The wind is predicted to be cross-shore as the swell arrives.

The most powerful waves expected at Dunedin - St Clair in the next 16 days are 4.0m 12s and forecast to arrive on Tuesday (Aug 04) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 7s period and expected on Monday (Aug 10) at 6AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Mon 3rd Aug)10ft (3.0m) 14s
Best Surf12PM (Mon 3rd Aug)10ft (3.0m) 14s
Most Powerful 3PM (Tue 4th Aug)13ft (4.0m) 12s

Table - best surf conditions forecast for Dunedin - St Clair over the next 16 days.


The Lowdown

G’day, Rusty here. Let’s break down the Dunedin outlook. First couple of days are a bust, but there’s some real gems if you’re willing to wait. Water temp is about average for this time of year, nothing to write home about.

The week starts rough. Monday the 3rd and Tuesday the 4th are total garbage—strong cross-shore winds and big, messy swell. The wave energy is off the charts (6654 on Monday morning) but it’s just a lumpy, wind-chopped mess. Don’t even think about it. That’s a two-day gap right off the bat.

Wednesday the 5th morning is a shift. At St-Clair, we’ve got a clean 8ft swell from the SSE with a nice long 11-second period, and a light cross-offshore WNW breeze. The energy is moderate (1172), and the wind and tide are lining up. But the swell is predicted to be too big for this break that morning, so be careful. The afternoon drops to 7ft and the wind goes cross-on, so it’s not the pick.

Now, Thursday the 6th morning is where it gets good. A clean 5ft swell from the SSE, 9-second period, light WNW cross-offshore breeze. The combined energy is 524 (moderate), and the conditions are very good. A solid, fun morning.

Friday the 7th and Saturday the 8th are smaller but clean. Friday morning has 3ft from the S with a 12-second period and a light NNE cross-offshore breeze. Energy is low at 390, but it’s clean. Saturday morning is even smaller at 3ft from the S, 10-second period, with a glassy NE breeze. Nice for a longboard.

Sunday the 9th and Monday the 10th are more of the same—clean, small, consistent. Monday the 10th morning bumps up to 4ft from the SSE, 12-second period, with a light N cross-offshore breeze. Energy is 683, and the conditions are very good.

The real standout is Tuesday the 11th morning. This is the best on offer. At St-Clair, we’ve got a 6ft swell from the E, 10-second period, with a light offshore N breeze—dead clean. The combined energy is 638 (moderate), and that offshore wind will make for clean, punchy waves. A morning to get excited about.

Wednesday the 12th and Thursday the 13th are still good. Thursday the 13th morning has a very long-period 17-second groundswell from the SSW, but only 3ft. The energy is 509, and with a light N cross-offshore breeze, it’s clean. That long period means the waves will be fat and slow at the beach, but the point and reef could be fun.

The second standout is Saturday the 15th afternoon. This one is a beauty. At St-Clair, we’ve got a 5ft swell from the E, 11-second period, with glassy conditions. The combined energy is 661, and it’s dead flat—no wind. A rare, clean, glassy afternoon. The crowd profile says “sometimes,” so it might be worth a paddle.

Sunday the 16th is also excellent, with a 5ft ESE swell, 11-second period, and a light offshore NNW breeze. Energy is 995, which is strong. Clean, punchy waves.

Monday the 17th is a write-off again with rain and cross-shore wind. Tuesday the 18th morning rounds out the forecast with a clean 6ft swell from the E, 9-second period, and a light offshore NNW breeze. Energy is 682. A solid, clean morning to finish on.

So, to sum it up: the first few days are a washout, but once you get past Tuesday the 5th, there’s a string of clean mornings. The two standout sessions are Tuesday the 11th morning for the offshore winds and punchy 6ft E swell, and Saturday the 15th afternoon for the rare glassy conditions and 5ft E swell. Both at St-Clair.

Rusty.

Short Range Forecast

Moderate rain (total 16mm), heaviest on Mon morning. Very mild (max 12°C on Sun night, min 1°C on Tue night). Winds decreasing (strong winds from the WSW on Mon afternoon, light winds from the W by Wed morning).

Days 5-7 Weather Summary

Mostly dry. Mild temperatures (max 9°C on Sat morning, min 2°C on Wed night). Wind will be generally light.

Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
0
0
0
0
0
!
!
2
2
3
2
3
1
1
2
2
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
SSW
12
3.5
SSW
14
2
SSW
10
3
SSW
12
3.5
S
12
4
S
12
2.5
S
11
2.3
SSE
11
2
SSE
10
1.6
SSE
10
1.5
SSE
9
1.2
SE
11
1.1
S
15
1
S
12
1.1
S
11
1
S
10
1
S
10
0.5
S
17
0.9
SSE
13
Wave Graph
Metric surfscale
Energy kJ
522
4374
826
2770
3235
4777
1642
1146
757
442
352
341
538
290
289
202
196
153
295
Wind (km/h)
30
W
35
WSW
45
WSW
35
WSW
35
SW
35
SW
10
W
10
WNW
10
SW
10
WNW
10
WNW
10
ENE
10
N
15
NNE
15
NE
10
NNE
5
NE
15
NE
15
NE
Wind State
cross-off
cross
cross
cross
cross-on
cross-on
cross-off
cross-off
cross-on
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
6:57AM1.58m
7:23PM1.60m
7:47AM1.58m
8:14PM1.58m
8:42AM1.60m
9:09PM1.58m
9:40AM1.64m
10:06PM1.59m
10:38AM1.69m
11:04PM1.62m
11:36AM1.75m
00:01AM1.66m
Low Tide
00:42AM0.28m
1:00PM0.26m
1:24AM0.28m
1:46PM0.27m
2:09AM0.28m
2:37PM0.29m
3:00AM0.27m
3:32PM0.30m
3:56AM0.26m
4:34PM0.29m
4:58AM0.24m
5:40PM0.27m
part cloud
rain showers
rain showers
mod rain
light rain
cloud
part cloud
clear
part cloud
clear
clear
clear
part cloud
part cloud
cloud
part cloud
cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:54
7:54
7:52
7:50
7:50
7:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:32
5:34
5:35
5:37
5:37
5:38
 mm
4
1
9
2
Temp °C
12
10
8
4
5
6
5
4
6
3
5
6
3
6
6
5
9
9
8
Feels °C
5
2
-2
-6
-4
-3
0
1
3
0
3
3
-1
0
1
0
5
5
4
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Dunedin - St Clair Surf forecast

The above surf forecast table for Dunedin - St Clair provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Dunedin - St Clair can be found by selecting the local surf guide option on the grey menu. Our Dunedin - St Clair 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 (Dunedin - St Clair) 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 Dunedin - St Clair 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.

Dunedin - St Clair is 5 km (3 miles) from Dunedin. If you plan a holiday in Otago, look for hotels and other accommodation in Dunedin. Dunedin has rooms for a wide range of budgets as well as car hire and transport links.

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