Dunedin - St Clair Surf Break

Lat Long: 45.91° S 170.50° E

Dunedin - St Clair Surf Forecast and Surf Report

Issued: 11 am 21 Jul 2026 (local time)

Forecast update in  hr  min

Today's Dunedin - St Clair sea temperature is
10.7° C
1.7° 

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 21 Jul 2026:

  • Best quality surf: Tuesday 28 Jul, 6AM (local time) - 7ft (2.1m), 14s period, ESE swell with cross-offshore winds.
  • Most powerful swell: Tuesday 28 Jul, 6AM (local time) - 7ft (2.1m), 14s period, ESE swell with 1,752 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 21 Jul, 6PM (local time) - 3.5ft (1.0m), 12s period with S 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 Tuesday (Jul 21) at 6PM. The primary swell is predicted to be 1.0m and 12s period with a secondary swell of 0.4m and 11s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Dunedin - St Clair in the next 16 days are 2.1m 14s and forecast to arrive on Tuesday (Jul 28) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 7s period and expected on Friday (Jul 24) at 12PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Tue 21st Jul)3.5ft (1.0m) 12s
Best Surf 6AM (Tue 28th Jul)7ft (2.1m) 14s
Most Powerful 6AM (Tue 28th Jul)7ft (2.1m) 14s

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


The Lowdown

Alright folks, Rusty here. Let’s talk about what’s coming up for the Dunedin - St Clair stretch. We’ve got a solid 16-day window to look at, and while it starts off a bit slow, the back half of the run has some serious potential.

For the first few days, we’re in a bit of a lull. Tuesday the 21st is the only real option to kick things off, with a 4.3ft S swell wrapping in with a 12-second period. The combined energy is moderate (522), and with a light NW breeze, it’s clean. It’s not a standout, but it’s a start. Water temps are sitting at 51°F, which is a touch warmer than usual for this time of year, so it’s a bit more comfortable than you’d expect.

Then we hit a dry patch. Wednesday the 22nd drops off, and by Thursday the 23rd we’re looking at tiny 1.0ft waves. Friday the 24th offers a glassy 1.6ft with a long 15-second period, but the energy is weak (134). Saturday the 25th is a write-off with fresh wind. Essentially, from the 22nd through the 25th, there’s nothing worth paddling out for.

The surf starts to wake up again on Sunday the 26th. The morning session is the pick here with a 3.6ft SSW swell, a 13-second period, and a light cross-offshore breeze. The energy is getting strong (768), and the conditions are clean. Monday the 27th morning is similar, but the real gem is Monday afternoon: glassy conditions, 3.0ft of ESE swell with a very long 15-second period, and a combined energy of 726. That’s a beautiful, clean, long-period groundswell setup for the point. Crowds are only sometimes an issue, so you might get a few waves to yourself.

Now, here’s where things get serious. Tuesday the 28th brings a big jump in size. We’re looking at 6.9ft of ESE swell with a 14-second period, and the energy is pumping (1781). But this is too big for a beginner-friendly break like St Clair. The wind is calm, but the swell is just too meaty for the average surfer. Wednesday the 29th morning is the standout for experienced surfers only. 5.6ft, 13-second ESE swell, strong energy (1054), and a clean cross-offshore breeze. The file says it’s excellent for those who can handle it. If you’re not an expert, sit this one out.

Thursday the 30th and Friday the 31st ease off a bit, offering clean 4.3ft to 5.6ft waves with light winds, but the water is still pretty full. The crowd factor is back to being manageable.

Then we hit the final big push. Saturday the 1st of August morning has 8.2ft of E swell, but it’s too big for the break. The afternoon is a total loss with a 25 mph SW cross-on. Sunday the 2nd and Monday the 3rd are also in the too-big-for-this-break category, with huge energy readings (3564 on Sunday morning). This is serious, heavy water. For the average surfer, it’s a no-go.

The window closes on Tuesday the 4th with a 5.2ft S swell at a very long 16-second period. The morning is clean with a cross-off breeze, and the energy is very strong (2244). This is for experts only, as the swell is still solid. Wednesday the 5th fades out with messy onshore winds and falling energy.

The standouts: If you’re looking for the best all-rounder, hit Monday the 27th at St Clair – the afternoon session is glassy with a long-period groundswell. It’s the most accessible good wave of the run. For the experienced crew, Wednesday the 29th morning is the one to circle – punchy, clean, and powerful.

Short Range Forecast

Mostly dry. Very mild (max 14°C on Thu afternoon, min 7°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Fri morning. Mild temperatures (max 9°C on Fri morning, min 2°C on Sat night). Winds increasing (calm on Fri morning, fresh winds from the WSW by Fri night).

Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
2
2
2
1
0
1
0
1
1
0
0
1
1
2
3
2
3
2
3
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
S
12
1
S
12
0.9
SSW
12
0.9
SSW
13
0.8
SSW
13
0.4
SSW
13
0.3
SSW
12
0.2
SSW
12
0.3
SSW
14
0.5
SSW
15
0.6
SSW
16
0.7
SSW
17
0.8
SSW
16
0.9
SSW
16
1.2
SSW
14
1.1
SSW
13
1.1
SSW
11
1.1
SSW
11
0.7
SE
13
0.9
ESE
15
1.8
ESE
14
Wave Graph
Metric surfscale
Energy kJ
488
280
254
238
195
65
30
15
36
130
191
293
354
435
631
444
314
303
195
395
1196
Wind (km/h)
10
NW
5
NW
10
WNW
10
WNW
5
ENE
15
NNE
10
N
20
NNW
10
NW
0
N
10
SW
30
WSW
25
W
20
SW
5
WSW
10
W
10
SW
10
NW
10
WNW
0
WSW
10
NW
Wind State
cross-off
off
cross-off
cross-off
cross
cross-off
off
off
off
glassy
cross-on
cross
cross-off
cross
cross
cross-off
cross
off
cross-off
glassy
off
High Tide
9:40AM1.65m
10:04PM1.62m
10:33AM1.63m
10:55PM1.58m
11:23AM1.62m
11:44PM1.55m
12:11PM1.62m
00:32AM1.54m
12:57PM1.62m
1:17AM1.55m
1:42PM1.64m
2:01AM1.56m
2:25PM1.66m
2:43AM1.57m
Low Tide
3:32PM0.33m
3:58AM0.33m
4:30PM0.39m
4:54AM0.37m
5:29PM0.41m
5:50AM0.38m
6:26PM0.42m
6:43AM0.37m
7:18PM0.40m
7:33AM0.35m
8:05PM0.37m
8:18AM0.32m
8:48PM0.34m
part cloud
part cloud
clear
clear
part cloud
part cloud
cloud
cloud
part cloud
light rain
light rain
rain showers
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
8:08
8:07
8:07
8:07
8:04
8:03
8:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:19
5:20
5:21
5:22
5:22
5:23
5:24
 mm
1
1
1
Temp °C
11
12
10
10
10
8
12
14
11
9
9
8
6
7
5
5
7
4
6
8
5
Feels °C
7
9
6
8
7
4
8
8
7
8
6
5
-1
1
2
1
3
0
2
5
1
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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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