Surf Forecasts:
Ruby Bay surf forecast from 14 Jul 2026:
- Most powerful swell: Thursday 16 Jul, 3AM (local time) - 3.5ft (1.1m), 5s period, NW swell with 72 kJ wave energy.
Best Forecast Surf Conditions for Ruby Bay this week:
The most powerful waves expected at Ruby Bay in the next 16 days are 1.1m 5s and forecast to arrive on Thursday (Jul 16) at 3AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Thursday (Jul 16) at 6AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3AM (Thu 16th Jul) | 3.5ft (1.1m) 5s |
Table - best surf conditions forecast for Ruby Bay over the next 16 days.
The Lowdown
Alright mate, let’s get real. The forecast for Ruby Bay over the next 16 days is a flat spell. There’s a tiny bit of energy here and there, but nothing worth paddling out for. The first real recommendation doesn’t show up at all, so we’re looking at a long gap of poor surf conditions right through the period.
The water temperature at the start is sitting at 52°, which is a bit colder than normal for this time of year, by about 3° – so you’ll want a good thick wetsuit.
For the first week, starting Wednesday 15 July, it’s a total write-off. The swell is either non-existent or barely a ripple, with combined swell energy values of 0 to 3 (very weak). Winds are light and often glassy, but with no waves, that doesn’t help. Thursday 16 July through the weekend stays flat, with no swell height recorded at all. The pattern of “poor surf conditions” just keeps repeating.
Into the second week, there’s a tiny flicker of hope. On Wednesday 22 July, we see a small bump of 0.7ft to 1.0ft swell from the north, with a period of 11 to 12 seconds. That’s a long-period groundswell, but the energy is still weak at 16 to 22 (very weak). The wind is light offshore or glassy, so it would be clean, but at that size, it’s barely rideable for a beginner. And Ruby Bay is a point break that rarely breaks, so this is a long shot. Even then, the swell direction is from the north, but the optimum for this spot is from the north, so that’s about the only thing going for it.
After that, it fades right back to nothing. Thursday 24 July has a tiny 0.3ft swell at 13 seconds, but again, energy is just 4 to 5. The rest of the month is flat, with no swell recorded at all from Saturday 26 July onward.
So, to be honest, there’s no standout here. If you’re desperate, the best chance is that Wednesday 22 July morning, with a clean 1.0ft north swell and glassy conditions at Ruby Bay, but don’t expect much. The rest of the 16 days is a total blank. For an area like this, a quiet run is pretty normal, so forecasts could change, but right now, leave the board in the garage.
Rusty.
Short Range ForecastSome drizzle, heaviest during Wed night. Very mild (max 16°C on Wed afternoon, min 5°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Sun morning. Very mild (max 13°C on Sat afternoon, min 6°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | |||||||||||||||
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) | N 6 | NW 16 | N 5 | NNW 6 | N 6 | NW 15 | NW 15 | NW 16 | NW 16 | NW 16 | NW 18 | NW 17 | N 6 | N 9 | N 11 | N 10 | N 10 | N 10 | N 10 | N 10 | N 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 30 | 0 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | off | off | off | off | glassy | off | off | off | glassy | glassy | glassy | glassy | glassy | on | off | off | glassy | off |
High Tide | 10:29AM4.09m | 11:02PM4.42m | 11:21AM4.15m | 11:45PM4.43m | 12:09PM4.15m | 00:27AM4.34m | 12:54PM4.08m | 1:09AM4.17m | 1:36PM3.95m | 1:51AM3.97m | 2:17PM3.79m | 2:36AM3.76m | 2:59PM3.61m | ||||||||
Low Tide | 4:34PM0.75m | 4:53AM0.59m | 5:21PM0.68m | 5:39AM0.58m | 6:03PM0.69m | 6:23AM0.66m | 6:42PM0.79m | 7:05AM0.82m | 7:19PM0.95m | 7:48AM1.03m | 7:57PM1.16m | 8:33AM1.25m | 8:41PM1.39m | ||||||||
 | |  |  | |  | | | | | |  |  | | | | | | | | | |
 | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:47 | — | — | 7:47 | — | — | 7:46 | — | — | 7:45 | — | — |
 | — | 5:16 | — | — | 5:17 | — | — | 5:19 | — | — | 5:20 | — | — | 5:21 | — | — | 5:21 | — | — | 5:22 | — |
mm | — | — | 1 | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 14 | 16 | 11 | 14 | 15 | 9 | 12 | 13 | 7 | 12 | 13 | 9 | 8 | 10 | 9 | 10 | 10 | 8 | 10 | 12 | 7 |
Feels °C | 13 | 15 | 10 | 11 | 12 | 7 | 10 | 11 | 5 | 8 | 9 | 8 | 7 | 9 | 8 | 8 | 8 | 6 | 8 | 10 | 5 |
Swell 1 Height (m) Direction Period (s) | N 6 | N 6 | NNW 16 | NNW 6 | N 6 | NNW 5 | NNW 5 | NW 16 | NW 16 | NW 16 | NNW 5 | NNW 4 | NW 16 | NW 16 | E 4 | ENE 4 | NW 14 | — | N 10 | N 10 | N 3 |
| kJ | 30 | 20 | 24 | 33 | 16 | 5 | 2 | 10 | 10 | 10 | 2 | 1 | 10 | 10 | 1 | 2 | 8 | — | 2 | 2 | 1 |
Swell 2 Height (m) Direction Period (s) | NW 16 | NW 16 | — | NNW 16 | NW 15 | NW 15 | NW 15 | NW 5 | — | NW 5 | NW 15 | NW 17 | — | N 9 | NW 15 | NW 15 | N 10 | NW 14 | — | — | N 10 |
| kJ | 69 | 63 | — | 24 | 9 | 9 | 9 | 1 | — | 1 | 9 | 12 | — | 2 | 9 | 8 | 2 | 8 | — | — | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | NW 18 | — | N 6 | — | N 11 | N 10 | — | N 10 | — | N 7 | NW 13 |
| kJ | — | — | — | — | — | — | — | — | — | — | 13 | — | 1 | — | 2 | 2 | — | 2 | — | 1 | 6 |
Wind waves Height (m) Direction Period (s) | — | — | N 5 | — | — | SSW 2 | SW 2 | — | — | WSW 2 | — | — | — | ENE 2 | — | E 4 | ENE 4 | — | — | — | — |
| kJ | — | — | 11 | — | — | 1 | 1 | — | — | 1 | — | — | — | 1 | — | 1 | 1 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 115 | 115 | 129 | 14 | 142 | 88 | 83 | 83 | 83 | 83 | 142 | 88 | 88 | 83 | 83 | 83 | 83 | 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
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