Devonport Rivermouth Surf Break

Lat Long: 41.16° S 146.36° E

Devonport Rivermouth Surf Forecast and Surf Report

Issued: 9 am 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Devonport Rivermouth sea temperature is
12.8°C
0.4° 

Devonport Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Devonport Rivermouth surf forecast from 31 Aug 2026:

  • Best quality surf: Sunday 6 Sep, 10PM (local time) - 1.5ft (0.4m), 15s period, NW swell with glassy winds.
  • Most powerful swell: Thursday 3 Sep, 7AM (local time) - 10ft (3.0m), 8s period, NW swell with 1,060 kJ wave energy.
  • Next surfable swell (1★+): Sunday 6 Sep, 10PM (local time) - 1.5ft (0.4m), 15s period with NW swell.

Best Forecast Surf Conditions for Devonport Rivermouth this week:

The surf forecast for Devonport Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 06) at 10PM. The primary swell is predicted to be 0.4m and 15s period with a secondary swell of 0.5m and 4s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Devonport Rivermouth in the next 16 days are 3.0m 8s and forecast to arrive on Thursday (Sep 03) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Sun 6th Sep)1.5ft (0.4m) 15s
Best Surf10PM (Sun 6th Sep)1.5ft (0.4m) 15s
Most Powerful 7AM (Thu 3rd Sep)10ft (3.0m) 8s

Table - best surf conditions forecast for Devonport Rivermouth over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let’s look at what’s on offer for Devonport Rivermouth over the next sixteen days. I’ve gotta be straight with you – it’s a bleak stretch of forecasts. We’ve got a massive gap of poor conditions with no real green lights for a solid paddle. This is one of those runs where the ocean just isn’t playing ball.

The first few days through to the start of September are a write-off – tiny waves with weak energy and cross-shore winds killing any shape. Tuesday afternoon sees a bump in size to 6 ft from the NNW, but it’s cross-onshore, choppy, and with a short period around 7 seconds. Not worth your time. By Thursday the 3rd, we’ve got 8 ft from the NW with a bit more period (8 seconds), and cross-offshore winds that keep it clean, but the energy is getting up there (874). That’s getting big for a beginner, and for a river mouth, that much swell on a cross-off might make for a tricky, thumping shorebreak. Friday the 4th has a 7 ft afternoon pulse, but it’s cross-on and messy – not your friend.

The middle of the second week shows a slight improvement. Wednesday the 9th of September offers clean, glassy conditions in the morning with a SW wind swinging to a light cross-off in the afternoon. The swell is tiny though – 2 ft – and from the NW with a very long period of 18 seconds. That long-period groundswell will slide right past a beachy river mouth setup, so while it’s clean, the wave shape will be soft and wonky. Combined energy is moderate (199). It’s surfable, just not inspiring.

There is *one* standout, but it comes with a big caveat. Friday the 11th of September morning sees flat-calm, glassy conditions with a teeny 2 ft NE swell (87 energy). Again, the wind is perfect, but without any real push, you’d be floating around waiting on crumbs. The water temperature is sitting at around 55°F, which is about average for this time of year.

All up, this forecast is a dud for Devonport Rivermouth. The river mouth is inconsistent at the best of times, and there's nothing here that breaks through as a proper session. If you’re desperate for a paddle, the clean windows around the 11th might let you get wet, but don’t expect to get much more than a few small, slow ones. With this much swell and mostly onshore/cross conditions, it looks more interesting for a kite session than a surf.

Stay patient, keep an eye on the charts – it tends not to stay this poor for too long.

Rusty.

Short Range Forecast

Moderate rain (total 12mm), heaviest on Tue afternoon. Very mild (max 17°C on Mon morning, min 7°C on Mon night). Winds increasing (calm on Mon night, strong winds from the NW by Wed night).

Days 4-6 Weather Summary

Moderate rain (total 15mm), heaviest on Fri night. Very mild (max 13°C on Fri night, min 8°C on Thu afternoon). Winds decreasing (strong winds from the NW on Fri night, light winds from the WNW by Sat night).

Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
2
0
0
0
0
1
0
0
0
0
0
1
1
0
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)
0.1
N
21
1.1
NW
5
0.3
NW
17
0.7
NNW
4
1.8
NNW
7
2.3
NW
7
1.2
NW
6
1.4
NW
6
2
NW
6
2.5
NW
8
2.5
WNW
8
1.6
WNW
7
0.6
NW
16
2
NW
6
3
NW
7
2.5
NW
8
2.5
WNW
8
0.8
NW
19
0.6
NW
17
0.6
NW
16
0.3
NW
14
Wave Graph
Metric surfscale
Energy kJ
9
51
47
16
297
535
113
129
307
840
941
279
203
287
820
912
804
414
235
157
32
Wind (km/h)
15
W
20
WNW
10
W
15
NW
25
NW
20
W
20
WNW
25
WNW
35
NW
35
W
35
W
25
W
20
WNW
30
NW
40
NW
40
WNW
35
W
20
W
15
WNW
15
NW
10
NNE
Wind State
cross-off
cross
cross-off
cross-on
cross-on
cross-off
cross
cross
cross
cross-off
cross-off
cross-off
cross
cross-on
cross-on
cross
cross-off
cross-off
cross
cross-on
on
High Tide
1:35PM2.97m
2:00AM3.00m
2:21PM3.08m
2:53AM3.13m
3:07PM3.19m
3:44AM3.23m
3:52PM3.30m
4:34AM3.31m
4:38PM3.37m
5:25AM3.33m
5:25PM3.39m
6:16AM3.30m
6:14PM3.36m
Low Tide
7:52PM0.95m
8:15AM0.92m
8:42PM0.76m
9:05AM0.88m
9:30PM0.58m
9:52AM0.86m
10:17PM0.44m
10:38AM0.86m
11:04PM0.36m
11:25AM0.89m
11:52PM0.33m
12:13PM0.95m
00:43AM0.38m
clear
clear
part cloud
cloud
light rain
rain showers
cloud
part cloud
rain showers
rain showers
rain showers
part cloud
cloud
rain showers
rain showers
rain showers
part cloud
part cloud
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:39
6:39
6:37
6:35
6:33
6:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:47
5:49
5:50
5:51
5:52
5:52
5:53
 mm
3
4
5
1
1
1
11
1
Temp °C
17
17
9
14
14
13
12
12
12
10
9
9
12
12
13
9
12
11
12
12
10
Feels °C
12
12
5
9
9
8
7
7
6
2
1
2
6
5
6
0
6
5
8
9
8
  • Map Icons:
  • Break
  • 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 Devonport Rivermouth Surf forecast

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

Devonport Rivermouth is 5 km (3 miles) from Devonport. If you plan a holiday in North Coast of Tasmania, look for hotels and other accommodation in Devonport. Devonport has rooms for a wide range of budgets as well as car hire and transport links.

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