Beach forecast for Niihama
Today, Thursday, October 29, 2026 · local time (GMT+9) · Ehime, Japan Today, Thu, Oct 29 · GMT+9- Swimming
- Calm · 0.4 ft
- Water
- 73 °F · nice
- Max UV
- 4 · SPF 30
- Low tide
- 6:23 am and 7:01 pm
Today, Thursday, October 29, it's a fair beach day in Niihama (5/10). The best hours are from 7:00 am to 12:00 pm: sunshine, little wind, a calm sea, water at 73 °F and low tide at 6:23 am, though with cool air. The best day this week is Monday, November 2, at 6/10.
Beach forecast for the next 7 days
| Day | Rating | Best hours | Swimming | Water | UV |
|---|---|---|---|---|---|
| Today | 5Fair beach day | 7:00 am–12:00 pm | Calm · 0.4 ft | 73 °F | 4 |
| Fri 30 | 5Fair beach day | 3:00–5:00 pm | Calm · 0.1 ft | 73 °F | 2 |
| Sat 31 | 5Fair beach day | 9:00 am–2:00 pm | Calm · 0.5 ft | 73 °F | 4 |
| Sun 1 | 2Not a beach day | No good window | Calm · 0.1 ft | 72 °F | 4 |
| Mon 2 | 6Fair beach day | 3:00–5:00 pm | Calm · 0.2 ft | 72 °F | 1 |
| Tue 3 | 3Poor beach day | No good window | Calm · 0.1 ft | 72 °F | — |
| Wed 4 | 2Not a beach day | No good window | Calm · 0.4 ft | 71 °F | — |
Each rating comes from sun, temperature, rain, wind, waves, UV, water temperature and, where there is one, the tide.
Today in detail
- Sunny
- Onshore breeze (6 mph)
- Calm for swimming: 0.4 ft waves
- UV 4 (moderate): SPF 30 sunscreen
- Water at 73 °F (nice)
- Low tide at 6:23 am: more sand
Today, hour by hour
- Swimming Calm · 0.4 ft
0.4 ft waves: calm for swimming. Low rip current risk. Always follow the lifeguard's flags.
- Water 73 °F
Nice for swimming.
- Sun & sunscreen UV 4 · SPF 30
Max UV 4 (moderate): SPF 30 sunscreen, reapplied every 2 hours.
- Wind 8 mph
Onshore breeze (8 mph).
- Tide & sand 7:01 pm
Low tide at 6:23 am and 7:01 pm: that's when there's the most sand. High tide at 1:05 pm.
The best window, 7:00 am to 12:00 pm, brings sunshine, little wind, a calm sea, water at 73 °F and low tide at 6:23 am, though with cool air.
We don't have data on jellyfish, sargassum or beach closures: ask the lifeguard or check with the local beach authority.
Today, hour by hour
| Time | Rating | Sky | Feels like | Wind | Waves | UV |
|---|---|---|---|---|---|---|
| 7:00 am | 5 | Clear sky | 60 °F | 2 mph | 0.4 ft | 0 |
| 8:00 am | 5 | Clear sky | 61 °F | 1 mph | 0.4 ft | 1 |
| 9:00 am | 5 | Clear sky | 62 °F | 2 mph | 0.3 ft | 2 |
| 10:00 am | 5 | Clear sky | 61 °F | 4 mph | 0.3 ft | 4 |
| 11:00 am | 4 | Clear sky | 62 °F | 6 mph | 0.3 ft | 4 |
| 12:00 pm | 3 | Mainly clear | 63 °F | 8 mph | 0.3 ft | 4 |
| 1:00 pm | 2 | Partly cloudy | 64 °F | 7 mph | 0.3 ft | 3 |
| 2:00 pm | 1 | Overcast | 64 °F | 5 mph | 0.2 ft | 1 |
| 3:00 pm | 4 | Overcast | 66 °F | 3 mph | 0.2 ft | 1 |
| 4:00 pm | 4 | Overcast | 67 °F | 3 mph | 0.2 ft | 0 |
Beach hours only: from one hour after sunrise to half an hour before sunset.
Beaches near Niihama
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- やしの木ビーチ 人工海浜 2.5 mi · NE
- Restrooms
- Showers
- Parking
Named beaches within 6.2 mi, nearest first. Amenities from OpenStreetMap: some may be missing or out of date. View on OpenStreetMap · Add or fix on OpenStreetMap
Beaches and amenities: © OpenStreetMap contributors (ODbL).
Webcams near Niihama
Webcams provided by windy.com — add a webcam
How we rate a beach day
We rate every beach hour from 0 to 10 with simple, fixed rules:
- Adds: sunshine (up to 3 points, fewer with more clouds), warmth (up to 4, from the feels-like temperature; ideal between 81 °F and 91 °F), a calm sea (1), water at 70 °F or warmer (1; from 64 °F, half) and low or mid tide (1: more sand). Anything without data is left out and the rest is scaled to 10.
- Takes away: cold (feels-like below 64 °F, 1 to 4 points), rain (half a point if likely, up to 6 if it rains; thunderstorms, 8), wind from force 4, about 12 mph (1 to 6 points; half a point more if offshore, which blows inflatables out to sea, or onshore, which churns the water), waves (1 to swim with care, 4 if dangerous, 1 more for high rip current risk), very high UV (half a point; extreme, 1), water below 59 °F (1) and spring high tides (1: little sand left).
- Swimming: calm, use care (waves from 2.6 ft, or long swell) or dangerous (from 6.6 ft, or 4.9 ft with a long period), based on how much of the wave reaches this shore given the way it faces. In the U.S., today's and tomorrow's rip current risk comes from the National Weather Service surf zone forecast when it issues one; otherwise we estimate it from the waves.
- Best windows: runs of 2 to 5 hours rated 4 or more and close to the best hour, at least one hour apart.
- Day rating: the average of the best window; a 2-hour window keeps 85% of it and a 3-hour window 95%.
Today, in the best window: sun 3 of 3, warmth 0 of 4, calm sea 1 of 1, water 1 of 1 and tide 0.7 of 1; minus cold 1.
It's a guide, not a guarantee: weather changes and every beach is different. Always follow the lifeguard's flags.
Questions about the beach in Niihama
Is it a beach day in Niihama today?
A fair beach day: 5/10. Best from 7:00 am to 12:00 pm, with sunshine, little wind, a calm sea, water at 73 °F and low tide at 6:23 am, though with cool air.
What are the swimming conditions in Niihama today?
0.4 ft waves: calm for swimming. Low rip current risk. Always follow the lifeguard's flags.
How warm is the water in Niihama?
About 73 °F today: nice. That's the sea surface temperature offshore; it can differ a little at the shoreline.
How much sun protection do I need in Niihama today?
UV reaches 4 (moderate): SPF 30 sunscreen, sunglasses and a hat.
When is low tide in Niihama?
Today low tide is at 6:23 am and 7:01 pm: that's when there's the most sand. High tide is at 1:05 pm.
What about tomorrow? Will it be a beach day in Niihama?
Tomorrow, Friday, October 30: a fair beach day (5/10), best from 3:00 pm to 5:00 pm.
What beaches are near Niihama?
やしの木ビーチ 人工海浜 (2.5 mi). See below for amenities and water quality.
Are there jellyfish or sargassum today?
We don't know: there's no open data on jellyfish, sargassum or closures for each beach. Ask the lifeguard, check the flags or the local beach authority's website.
How is the rating worked out?
From the hourly forecast: sun and clouds, feels-like temperature, rain, wind (and whether it blows onshore or offshore), waves and their period, UV, water temperature and, where there is one, the tide. Each factor adds or takes away a fixed number of points and the rating sums them up out of 10.
More about Niihama today
Learn more
Our own calculation, using the Open-Meteo forecast (ECMWF, NOAA GFS, Météo-France, Copernicus Marine and CAMS, CC BY 4.0), the tide from Niihama (JMA) and the sun from astronomy-engine. Source: Japan Meteorological Agency website (出典：気象庁ホームページ), tide table (潮位表) for Niihama (新居浜), https://www.data.jma.go.jp/kaiyou/db/tide/suisan/suisan.php?stn=NI. Public Data License (Version 1.0) (https://www.digital.go.jp/resources/open_data/public_data_license_v1.0), compatible with CC BY 4.0. Modified by TidePlanet (気象庁「潮位表」を加工して作成): harmonic constants fitted from the hourly prediction of 2025–2026; not an official JMA product.