Dunedin - St Clair Surf Break

Lat Long: 45.91° S 170.50° E

Dunedin - St Clair Surf Forecast and Surf Report

Issued: 5 am 12 Jul 2026 (local time)

Forecast update in  hr  min

Today's Dunedin - St Clair sea temperature is
10.0° C
1.0° 

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 12 Jul 2026:

  • Best quality surf: Friday 17 Jul, 3PM (local time) - 10ft (3.0m), 14s period, SW swell with cross-shore winds.
  • Most powerful swell: Saturday 18 Jul, 12AM (local time) - 16ft (5.0m), 19s period, SSW swell with 16,603 kJ wave energy.
  • Next surfable swell (1★+): Sunday 12 Jul, 3PM (local time) - 2ft (0.6m), 14s 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 Sunday (Jul 12) at 3PM. The primary swell is predicted to be 0.6m and 14s period with a secondary swell of 0.7m and 9s. 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 5.0m 19s and forecast to arrive on Saturday (Jul 18) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Monday (Jul 13) at 6PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Sun 12th Jul)2ft (0.6m) 14s
Best Surf 3PM (Fri 17th Jul)10ft (3.0m) 14s
Most Powerful12AM (Sat 18th Jul)16ft (5.0m) 19s

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


G’day, Rusty here. Looks like we’ve got a bit of a slow start, then a couple of real standouts coming through for Dunedin’s St Clair. This spot is a beach and point, exposed to the south swell, so it’s got a solid foundation when the ocean delivers. The water’s sitting around 50°, which is about 2° warmer than average for this time of year – a bit of a treat, really.

The first decent surf worth mentioning kicks off Sunday the 12th of July. It’s small, clean, and inviting. The morning session is the pick with a light offshore breeze from the NW, only 6 mph, and a little 2ft swell coming from the SSW with a very long period of 15 seconds. That’s classic groundswell energy, and the combined energy is in the moderate range at 322. It’s glassy, clean, and perfect for a beginner. The afternoon sees the wind swing to a cross-off, but it’s still tidy.

Monday the 13th is a write-off – poor conditions, so give it a miss. Tuesday the 14th is surfable but very ordinary, with a tiny 1ft to 1ft swell and moderate offshore winds. Not worth getting worked up about.

Now, here’s the first real standout. Wednesday the 15th of July. The morning is an absolute ripper. Glassy conditions – wind from the NNW at just 3 mph, and the swell lifts to 3ft from the SSW with a very long period of 17 seconds. The combined energy jumps to a strong 507, and it’s described as “glassy”. That’s the best early window. The afternoon holds glassy conditions too, though the swell drops a touch.

Thursday the 16th stays clean with a gentle offshore in the morning, and the swell builds to 3ft by the afternoon with moderate energy. Friday the 17th morning sees a 4ft SSW swell, period of 13 seconds, and solid energy at 726. Clean, cross-off wind. It’s looking very good for experienced beginners.

But here’s the big alert. Friday afternoon through Saturday the 18th, the swell absolutely hammers the coast. We’re talking 10ft from the SW and S, with periods around 14-17 seconds, and combined energy readings of 4869 and 5202 – that’s very strong. The wind is favourable, but that’s far too big for this break. This is for experts only, and even then, it’s a serious session. Not for the faint-hearted.

Sunday the 19th of July morning is still big, but it drops to 7ft from the S, with a period of 12 seconds and energy at 1376. The wind is cross-off, and it’s clean. This is labelled as excellent for experienced surfers. The afternoon, however, gets messy with a strong cross-shore wind and a 5ft swell – marginal.

Monday the 20th is a nice reset. The morning brings a 2ft S swell with a very long period of 16 seconds, light offshore wind from the north, and strong energy at 510. Clean and very good. The afternoon is a smaller 4ft with a shorter period, but still fun.

Tuesday the 21st is a solid, consistent day with 3ft to 3ft from the S, periods around 11-12 seconds, and light offshore winds. Good, clean, surfable waves.

Wednesday the 22nd and Thursday the 23rd are largely poor to marginal, with a lot of cross-off wind and messy conditions. The swell tries to build again, but the wind is not playing ball. Friday the 24th afternoon sees a 5ft ESE swell, period of 8 seconds, with light wind – it’s clean, but the period is short and choppy.

Saturday the 25th of July morning is a gem. Glassy conditions, wind from the NNW at just 3 mph, and a 4ft ESE swell. The period is short at 7 seconds, but it’s clean and fun. The afternoon sees a long-period S swell at 2ft with 18 seconds, but it’s tiny.

Now, the second standout. Sunday the 26th of July and Monday the 27th. Sunday morning has a 8ft east swell, period of 13 seconds, with a light offshore from the north. The combined energy is a massive 2056. This is very big, very clean, and labelled as too big for this break in the guidance – but it’s a serious wall for experts. Monday the 27th is the real prize for experienced surfers: the morning has a 7ft east swell, period of 12 seconds, strong energy at 1143, and a light offshore. The afternoon is glassy with a 6ft easterly, period of 12 seconds, and energy at 1028. That’s going to be a clean, powerful, and memorable session.

Crowds at St Clair can be a factor sometimes, so if you’re after space, be early for the standouts. Overall, the best on offer is Wednesday the 15th morning for the clean, glassy, long-period groundswell, and Monday the 27th of July for the big, clean, powerful east swell. Both are worth blocking out time for.

Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Tue night. Very mild (max 14°C on Tue morning, min 4°C on Sun morning). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Fri night. Very mild (max 13°C on Fri afternoon, min 5°C on Fri night). Winds increasing (calm on Wed morning, fresh winds from the WSW by Fri night).

Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
2
0
0
0
1
1
2
3
2
2
2
2
2
3
!
!
!
!
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SSW
15
0.6
S
14
0.8
SSW
13
0.6
SSW
13
0.4
SSW
12
0.3
ESE
9
0.3
SSW
18
0.4
SSW
16
0.8
SSW
17
0.8
SSW
17
0.7
SSW
16
0.7
SSW
15
0.6
SSW
15
0.9
SSW
14
0.7
ESE
15
1.1
SSW
13
3
SW
14
5
SSW
19
3
S
17
3
S
15
2.4
S
14
Wave Graph
Metric surfscale
Energy kJ
167
150
236
129
50
16
62
87
404
367
269
240
172
289
210
408
3540
16603
4799
3664
2058
Wind (km/h)
10
NW
10
NE
10
N
20
NNE
15
N
10
NW
25
NNW
5
NNW
10
NNW
5
NNW
5
SE
10
NW
15
NW
10
WSW
10
WNW
15
WNW
15
WSW
35
WSW
15
W
10
NW
10
NW
Wind State
off
cross-off
off
cross-off
cross-off
off
off
off
off
glassy
glassy
off
off
cross-off
cross-off
cross-off
cross
cross
cross-off
off
cross-off
High Tide
1:43PM1.89m
2:06AM1.78m
2:38PM1.94m
3:01AM1.80m
3:34PM1.95m
3:57AM1.82m
4:30PM1.95m
4:54AM1.81m
5:26PM1.92m
5:51AM1.79m
6:23PM1.87m
6:49AM1.76m
7:20PM1.80m
Low Tide
8:02PM0.16m
8:21AM0.07m
9:01PM0.11m
9:19AM0.02m
9:56PM0.07m
10:14AM-0.01m
10:48PM0.06m
11:07AM-0.00m
11:40PM0.07m
11:59AM0.03m
00:30AM0.10m
12:51PM0.10m
1:21AM0.16m
clear
clear
clear
part cloud
cloud
part cloud
cloud
part cloud
rain showers
cloud
part cloud
part cloud
part cloud
clear
clear
clear
light rain
rain showers
part cloud
clear
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
8:15
8:15
8:15
8:14
8:12
8:12
8:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:09
5:10
5:12
5:13
5:14
5:15
5:15
 mm
2
1
3
Temp °C
7
8
5
9
11
8
14
14
9
9
10
8
10
12
9
11
13
6
6
7
5
Feels °C
4
5
0
4
7
5
10
12
8
8
9
6
5
9
5
7
9
-2
2
4
0
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  • 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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