Ruby Bay Surf Break

Lat Long: 41.21° S 173.09° E

Ruby Bay Surf Forecast and Surf Report

Issued: 11 pm 10 Jul 2026 (local time)

Forecast update in  hr  min

Today's Ruby Bay sea temperature is
12.3° C
0.6° 

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


Ruby Bay surf forecast from 10 Jul 2026:

  • Best quality surf: Monday 13 Jul, 9PM (local time) - 6.5ft (2.0m), 8s period, N swell with glassy winds.
  • Most powerful swell: Monday 13 Jul, 9PM (local time) - 6.5ft (2.0m), 8s period, N swell with 453 kJ wave energy.
  • Next surfable swell (1★+): Monday 13 Jul, 9PM (local time) - 6.5ft (2.0m), 8s period with N swell.

Best Forecast Surf Conditions for Ruby Bay this week:

The surf forecast for Ruby Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Jul 13) at 9PM. The primary swell is predicted to be 2.0m and 8s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Ruby Bay in the next 16 days are 2.0m 8s and forecast to arrive on Monday (Jul 13) at 9PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 8s period and expected on Tuesday (Jul 14) at 12AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Mon 13th Jul)6.5ft (2.0m) 8s
Best Surf 9PM (Mon 13th Jul)6.5ft (2.0m) 8s
Most Powerful 9PM (Mon 13th Jul)6.5ft (2.0m) 8s

Table - best surf conditions forecast for Ruby Bay over the next 16 days.


Alright, Rusty here. Let’s take a look at what we’ve got coming. I have to level with you—Ruby Bay is a tough beat this whole stretch. It’s a sheltered little point that rarely breaks, and the forecast is backing that up. For the first several days, from Saturday the 11th right through to Monday the 13th, there’s almost nothing ridable. A few tiny pulses, but nothing that’ll stand you up. You’re looking at a long, quiet gap with very little on offer.

Come Monday the 13th morning, we finally see a blip—2ft from the NNW with a short period of 4 seconds and weak energy (19). That’s not much to write home about, and with glassy conditions, it’ll be clean but barely surfable. The afternoon picks up a touch to 3ft from the north, still short period (5 seconds) and only 41 combined energy, but winds turn cross-onshore, so it gets a little messy.

Tuesday the 14th morning is the first real standout—3ft from the north, period stretching to 8 seconds, and combined energy hitting 100 (moderate). Winds are glassy out of the southwest, so it’ll be clean. For Ruby Bay, that’s about as good as it’s going to get. The afternoon drops off a little to 3ft and 62 energy, still glassy though. This is your best window, but keep expectations in check for a beginner-friendly spot like this.

From Wednesday the 15th onward, it fades again—tiny waves in the 2ft to 2ft range, mostly short period and weak energy. The wind stays favorable (glass or offshore), so the surface will be clean, but the swell just isn’t there. By the 17th and 18th, we’re down to 0.3ft—basically flat.

A little later in the month, around Wednesday the 22nd afternoon, we see a spike: 5ft from the north, 7-second period, and combined energy of 192 (moderate). That’s a solid pulse for Ruby Bay, and with glassy winds it’ll look pretty. But keep in mind—this is a rarely-breaking point, so when it does come alive, it’s a treat. Thursday the 23rd morning follows with 3ft, 8-second period, and 138 energy, still glassy. That’s the other highlight.

After that, it’s back to tiny or flat through to the 26th. No standouts beyond the 22nd and 23rd that are worth getting excited about.

The water temperature is pretty much average for this time of year—nothing unusual to report.

Bottom line: Ruby Bay has two little windows—Tuesday the 14th morning, and then Wednesday the 22nd afternoon through Thursday the 23rd morning. That’s the pick of a very quiet period. Everything else is a flat, glassy lake.

Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Mon afternoon. Very mild (max 11°C on Mon morning, min 3°C on Fri night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 3mm), mostly falling on Mon night. Very mild (max 14°C on Tue afternoon, min 9°C on Mon night). Wind will be generally light.

Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Fri
17
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.1
NW
16
0.1
N
14
0.1
NW
17
0.1
NW
16
0.1
NW
16
0.1
NW
16
0.3
N
3
0.6
NNW
4
0.9
N
5
1.6
N
8
0.9
N
8
0.8
N
7
0.8
N
6
0.6
N
6
0.7
N
5
1.2
NNW
6
0.7
N
6
0.5
N
6
0.2
N
5
0.1
N
6
0.1
N
6
Wave Graph
Metric surfscale
Energy kJ
0
4
0
0
0
0
1
11
41
323
92
62
47
22
27
96
35
15
2
1
1
Wind (km/h)
5
SSW
5
SSW
5
NNE
5
SSW
5
S
5
NE
5
SW
5
SW
5
N
5
SW
5
SW
5
NNE
0
SSW
5
SSW
0
E
5
SSW
10
SW
10
SW
5
SW
10
SW
10
WSW
Wind State
off
off
glassy
glassy
glassy
glassy
glassy
glassy
cross-on
off
glassy
glassy
glassy
glassy
glassy
glassy
off
off
off
off
cross-off
High Tide
6:17AM3.58m
7:17PM3.54m
7:27AM3.68m
8:31PM3.78m
8:32AM3.83m
9:28PM4.06m
9:33AM3.98m
10:17PM4.29m
10:29AM4.09m
11:02PM4.42m
11:21AM4.15m
11:45PM4.43m
12:09PM4.15m
Low Tide
00:08AM1.38m
12:19PM1.34m
1:13AM1.21m
1:30PM1.24m
2:13AM1.02m
2:37PM1.08m
3:10AM0.84m
3:39PM0.90m
4:03AM0.69m
4:34PM0.75m
4:53AM0.59m
5:21PM0.68m
5:39AM0.58m
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
light rain
rain showers
clear
clear
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:50
7:50
7:50
7:50
7:48
7:48
7:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:14
5:15
5:15
5:16
5:16
5:17
5:19
 mm
2
3
Temp °C
5
9
9
6
9
9
7
11
11
10
12
14
10
13
14
12
12
14
9
14
15
Feels °C
2
7
6
4
8
7
5
10
8
9
11
13
9
12
14
12
9
11
7
11
13
  • 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 Ruby Bay Surf forecast

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

Are you planning a holiday in Nelson - Tasman Bay? If you are looking for accommodation near Ruby Bay, camping, hotels and holiday cottages in Nelson - Tasman Bay, consider staying in Nelson which is 17 km (11 miles) away. Alternatively, find information about places to stay and car hire in Blenheim which is 80 km (50 miles) away

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