
Surf Forecasts:
Ruby Bay surf forecast from 27 Jul 2026:
- Best quality surf: Friday 31 Jul, 12AM (local time) - 5ft (1.6m), 8s period, N swell with glassy winds.
- Most powerful swell: Thursday 30 Jul, 9PM (local time) - 6ft (1.9m), 7s period, N swell with 381 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 12AM (local time) - 5ft (1.6m), 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 Friday (Jul 31) at 12AM. The primary swell is predicted to be 1.6m and 8s period with a secondary swell of 0.1m and 19s. 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 1.9m 7s and forecast to arrive on Thursday (Jul 30) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 8s period and expected on Friday (Jul 31) at 6AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 31st Jul) | 5ft (1.6m) 8s |
| Best Surf | 12AM (Fri 31st Jul) | 5ft (1.6m) 8s |
| Most Powerful | 9PM (Thu 30th Jul) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Ruby Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a good hard look at what's on the table for Ruby Bay over the next couple of weeks. I gotta be straight with you – this one's a tough read. Ruby Bay is a sheltered little point break that rarely breaks, and this forecast is about as flat as a millpond for the majority of the period. The water temp is sitting around 53°, which is about 2° cooler than average for this time of year – not a huge shock, but you'll still want a decent wetsuit.
We're looking at a long stretch of nothing much. From now, right through the end of July and into the first week of August, the combined wave energy is basically zero or just a handful of tiny, weak pulses. The swell is nil or barely a ripple, and when there is a tiny bump, it's coming from the north, which is dead wrong for this spot that needs a northerly to really work. The wind is often light and sometimes glassy, which is a shame because there's no surf to clean up.
There is one little moment that pops up on the morning of the 30th of July. Thursday morning shows a pulse of 4ft from the NNW with a period of 6 seconds. That's a short-period, weak swell, and the combined wave energy registers a moderate 153, but the conditions are glassy. The problem is, it's still a poor surf call. For a beginner-friendly spot like this, 4ft can be a little punchy, but mostly it's just not the right direction and the period is too short to wrap in properly.
After that, it's back to a dead zone. Seriously, from the 31st of July right through to the 11th of August, the charts show nothing but flat lines. The odd 0.3ft ripple shows up on the 5th of August with a very long 18-second period, but the combined energy is a measly 6. That’s a ghost swell – you might feel a long-period bump, but it won't break. There’s nothing to ride.
So, what's the standout? Honestly, there isn't one that's worth paddling out for. The absolute best of a bad bunch is Thursday morning, 30th July. If you are absolutely desperate and a beginner, you could get a few knee-high dribbles on the glassy morning, but that's it. The combined energy (153) is the highest we'll see, but it's still a poor surf call.
In short, Ruby Bay is going to be a total blank for this 16-day window. It's normal for a sheltered, rarely-breaking spot like this to go through long flat spells. Don't hold your breath.
- Rusty
Short Range ForecastMostly dry. Very mild (max 11°C on Tue afternoon, min 3°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Thu night. Very mild (max 13°C on Thu afternoon, min 2°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | NNW 13 | N 12 | N 7 | N 11 | N 7 | N 6 | N 6 | NNW 3 | NNW 5 | NNW 6 | N 6 | N 8 | N 8 | NNW 8 | NNW 14 | NW 15 | NNW 12 | N 12 | NNW 4 | NW 19 | NW 4 |
Wave Graph | |||||||||||||||||||||
0 | 3 | 1 | 2 | 1 | 1 | 1 | 1 | 35 | 101 | 80 | 323 | 111 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | on | off | off | glassy | off | glassy | glassy | off | glassy | cross-on | glassy | cross-off | cross-off | cross-off | off | off | off | off | glassy | off |
High Tide | 9:06PM3.61m | 9:14AM3.43m | 9:44PM3.76m | 9:55AM3.59m | 10:19PM3.89m | 10:33AM3.72m | 10:53PM4.00m | 11:11AM3.81m | 11:26PM4.08m | 11:48AM3.84m | 00:00AM4.12m | 12:25PM3.84m | 00:35AM4.10m | ||||||||
Low Tide | 2:24PM1.55m | 2:53AM1.45m | 3:15PM1.37m | 3:29AM1.31m | 3:58PM1.17m | 4:03AM1.18m | 4:34PM0.99m | 4:37AM1.06m | 5:07PM0.85m | 5:11AM0.95m | 5:38PM0.78m | 5:47AM0.88m | 6:10PM0.79m | ||||||||
7:39 | — | — | 7:39 | — | — | 7:37 | — | — | 7:37 | — | — | 7:35 | — | — | 7:35 | — | — | 7:33 | — | — | |
— | 5:28 | — | — | 5:28 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — | 5:32 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 3 | 3 | 1 | — | — | — | — | — | — | — |
Temp °C | 9 | 10 | 4 | 10 | 11 | 6 | 10 | 10 | 6 | 10 | 13 | 11 | 10 | 9 | 8 | 11 | 12 | 4 | 10 | 12 | 5 |
Feels °C | 7 | 7 | 1 | 8 | 8 | 4 | 8 | 8 | 4 | 9 | 10 | 9 | 7 | 6 | 5 | 7 | 8 | 0 | 7 | 9 | 2 |
Swell 1 Height (m) Direction Period (s) | NNW 8 | NNW 8 | N 7 | N 7 | N 7 | N 6 | N 6 | NW 15 | N 5 | N 6 | — | N 8 | N 8 | NNW 8 | NNW 14 | NNW 8 | NNW 7 | NNW 5 | NNW 4 | NW 4 | NW 4 |
7 | 6 | 1 | 1 | 1 | 1 | 1 | 9 | 15 | 52 | — | 323 | 111 | 75 | 233 | 21 | 10 | 4 | 2 | 1 | 4 | |
Swell 2 Height (m) Direction Period (s) | NNW 13 | N 12 | NW 12 | N 11 | — | NW 11 | NW 11 | — | NW 14 | NW 17 | — | N 19 | NW 18 | NW 16 | — | NW 15 | NNW 12 | N 12 | — | NW 11 | — |
16 | 3 | 5 | 2 | — | 5 | 5 | — | 8 | 12 | — | 7 | 12 | 10 | — | 33 | 13 | 3 | — | 5 | — | |
Swell 3 Height (m) Direction Period (s) | — | NW 12 | — | — | — | — | NW 16 | — | — | — | — | NW 16 | — | — | — | NNW 12 | — | NW 13 | — | NW 19 | NW 11 |
— | 6 | — | — | — | — | 10 | — | — | — | — | 10 | — | — | — | 14 | — | 7 | — | 14 | 5 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | NNW 3 | NNW 5 | NNW 6 | N 6 | — | — | — | — | SW 3 | — | SW 2 | SSW 3 | — | — |
— | — | — | — | — | — | — | 1 | 35 | 101 | 80 | — | — | — | — | 2 | — | 1 | 1 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 38 | 84 | 83 | 83 | 83 | 83 | 83 | 83 | 14 | 7 | 129 | 0 | 14 | 125 | 14 | 38 | 85 | 83 | 83 | 83 | 83 |
Best forecast wave conditions in Nelson - Tasman Bay | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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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










