Dunedin - St Clair Surf Break

Lat Long: 45.91° S 170.50° E

Dunedin - St Clair Surf Forecast and Surf Report

Issued: 5 am 09 Jul 2026 (local time)

Forecast update in  hr  min

Today's Dunedin - St Clair sea temperature is
10.4° C
1.3° 

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 8 Jul 2026:

  • Best quality surf: Thursday 9 Jul, 12PM (local time) - 4.5ft (1.4m), 18s period, S swell with cross-offshore winds.
  • Most powerful swell: Thursday 9 Jul, 12PM (local time) - 4.5ft (1.4m), 18s period, S swell with 1,328 kJ wave energy.
  • Next surfable swell (1★+): Thursday 9 Jul, 12PM (local time) - 4.5ft (1.4m), 18s 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 Thursday (Jul 09) at 12PM. The primary swell is predicted to be 1.4m and 18s period with a secondary swell of 1.2m and 10s. 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 1.4m 18s and forecast to arrive on Thursday (Jul 09) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Monday (Jul 13) at 6PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Thu 9th Jul)4.5ft (1.4m) 18s
Best Surf12PM (Thu 9th Jul)4.5ft (1.4m) 18s
Most Powerful12PM (Thu 9th Jul)4.5ft (1.4m) 18s

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


G'day, I'm Rusty. Let's get into it, mate. We've got a solid run of swell on the way for St Clair, though we've got to sit through a few days of nothing much before the real action kicks off.

Right now, there's a pulse of S/SSW groundswell rolling in. Thursday morning the 9th of July at St Clair is looking clean with a light WNW cross-off breeze and a 4ft S swell at 14 seconds. The water's sitting at 51°, which is a touch warmer than normal for this time of year. The combined energy is strong at 1328, so there's plenty of push. This is excellent surf, but at 4ft, it's still manageable for experienced surfers, not too big. The wind stays light through Friday morning, with a 4ft S swell at 16 seconds, and the water stays clean. Saturday the 11th of July is a real standout—morning is clean with a 4ft SSW swell and a NW offshore breeze, but the afternoon is where it's at: glassy conditions, a 4ft SSW swell, and the period holding at 16 seconds. That's a dreamy session, just you and the ocean.

The swell drops off a bit into Sunday and Monday, with smaller waves around 2ft to 2ft. The wind stays favourable through Sunday morning with a NNW offshore, but it's small. Monday gets a bit windy from the NNE, and the surf is poor. From Tuesday the 14th of July through to Wednesday the 16th, it's pretty ordinary—small, inconsistent waves, and the wind starts to mess things up. Wednesday afternoon is a write-off with a 16 mph WSW cross-shore.

Then we get a shift. Friday the 17th of July brings a new ESE swell, 3ft at 14 seconds, and the morning has a clean NW offshore. The afternoon jumps to 3ft SE at 17 seconds, with a light N cross-off, and the energy is solid at 649. Not a huge size, but the quality is there. Saturday the 18th of July is another cracker: morning has a 5ft SE swell with a W cross-off, and the afternoon turns glassy with a 4ft SE swell. That's a clean, fun size for St Clair, and the energy is moderate to strong.

Now, the long-range stuff. Thursday the 23rd of July is nothing special, but hold onto your board for Friday the 24th of July. That morning, a 12ft E swell at 12 seconds rolls in, with a combined energy of 3267. That's a beast. The wind is a cross-off from the NE, but the swell is too big for this break—only for experts, and even then, it's a massive, powerful wave. The afternoon stays large at 10ft. This is a huge, powerful swell, but it's not for the faint-hearted. If you're a pro, it's a date, but it's a serious step up.

Rusty.

Short Range Forecast

Mostly dry. Mild temperatures (max 9°C on Sat afternoon, min 4°C on Thu morning). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 13°C on Tue afternoon, min 4°C on Sun morning). Wind will be generally light.

Thursday
9
Friday
10
Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
3
4
3
2
4
3
3
2
2
2
1
0
1
1
1
1
1
2
0
0
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
14
1.4
SSW
18
1.3
SSW
16
1.1
S
16
1
S
15
1.2
S
17
1.2
SSW
16
1.1
SSW
16
0.7
SSW
15
0.6
SSW
15
0.5
SSW
14
0.7
SSW
13
0.5
S
13
0.3
SSW
12
0.2
S
20
0.3
SSW
18
0.4
SSW
16
0.4
SSW
16
0.5
S
18
0.7
SSW
17
0.7
SSW
16
Wave Graph
Metric surfscale
Energy kJ
674
1231
905
596
441
869
749
636
237
167
120
184
86
30
30
61
87
80
165
315
266
Wind (km/h)
10
WNW
10
WSW
10
W
10
WNW
10
SSW
10
WNW
10
NW
5
NW
5
NNW
5
NNW
15
NE
20
NNE
20
NNE
15
NNE
10
NW
10
NNW
10
N
10
NW
5
NW
25
WSW
25
SW
Wind State
cross-off
cross
cross-off
cross-off
cross-on
cross-off
off
glassy
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross
cross
High Tide
10:59AM1.69m
11:23PM1.65m
11:53AM1.76m
00:18AM1.69m
12:48PM1.83m
1:12AM1.74m
1:43PM1.89m
2:06AM1.78m
2:38PM1.94m
3:01AM1.80m
3:34PM1.95m
3:57AM1.82m
4:30PM1.95m
Low Tide
4:54PM0.29m
5:19AM0.25m
5:57PM0.26m
6:20AM0.19m
7:01PM0.21m
7:21AM0.13m
8:02PM0.16m
8:21AM0.07m
9:01PM0.11m
9:19AM0.02m
9:56PM0.07m
10:14AM-0.01m
10:48PM0.06m
cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
cloud
clear
clear
part cloud
part cloud
light rain
light rain
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
8:18
8:17
8:17
8:15
8:15
8:15
8:14
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:07
5:08
5:09
5:09
5:10
5:12
5:13
 mm
2
2
Temp °C
6
7
7
7
8
8
8
9
7
6
8
6
8
10
8
10
13
11
9
7
7
Feels °C
2
3
4
4
5
4
4
7
4
3
4
0
3
6
5
7
9
7
6
1
0
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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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