# Tide and Weather - SurfTideΔ — Get tide & weather of Japan.

> Japan tide and weather forecast app for marine sports, fishing, and surfing. (iPhone/iPad app by Mitsuhiro Shirai.)

- Source: https://appshunter.io/ios/app/tide-and-weather-surftide/id1420388139 (this page in markdown: same URL + `.md`)
- Developer: [Mitsuhiro Shirai](https://appshunter.io/developer/602643484)
- Category: Weather
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings · 50 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 33 MB
- Languages: American English, Japanese
- Released: 2018-10-02
- Data updated: 2026-08-31
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/tide-and-weather-surftide/id1420388139/reviews.md

## What is Tide and Weather?

SurfTideΔ can be able to make the tide graph for surfers, fishermen and other people who enjoy marine sports. It show the weather forecast and the waves information as well.
(Tide's places are only Japanese.  Use Japan time zone.) 

▶You can check around 340 places of the tide in Japan
Tide graph is calculated with the "Tidal anharmonic constant" inside app. so you don't have to down load any data of the tide.

▶You can check quickly current tide
The app show a flashing mark on the tide graph current time. so you can check easily the tide moving. Also you can check a sunrise and a sunset from graph.
That's very useful for such as surfers, fishermen and and other people who enjoy marine sports.

▶It's convenient for fishing too
The app can be able to show a good time for fishing. They are between high tide and low tide on a few hours. In Japan, it's called  "上げ三分、上げ七分、下げ三分、下げ七分".

▶You can select easily the place you want
You can select from menu, places of you've seen before, easily. Also apps GPS function can able to know a tide's place nearby here, and show the tide graph and the weather forecast.

▶You can check the weather forecast every an hour for 7 days
You can get the weather forecast data for tide's place every an hour for 7 days. The data has important waves information for surfers such as the wind direction,  the wind speed, the waves direction, the waves height and the waves cycle.
The weather data is showed together the tide graph and numeric datas. so you can predict a future's condition of waves and tides.
The weather data is provided by  the online service of "WorldWeatherOnline". Very occasionally, maybe once or twice a year, there are times when data is not sent but usually a few hour after, it woudl be fixed. In this case, you should wait one in a while.

▶You can check the weather map
You can check weather map charts maximum 26.
The charts includes yesterday's chart fo every 3 hours,  today's chart fo every 3 hours, forecast after 24 and 48 hours and future forecast for 10 days.

▶You can check daily news of surfing and fishing
When there are new news, it's noticed by the icon marker on the app. You can read news such as surfing, fishing, this app's information and other.
The news is provided by Google news feed.

▶You can register your favorite sites
e.g. wave or weather forecast information etc..

▶You can show some data to your widget on device
You can show tides and weather information on the widget.
You can use newer widget added from iOS14, it can put anywhere on the home screen.

▼Displayable data from app
- Tide Graph
- A good time for fishing
- Time of low tide and high tide
- Age of moon 
- Tidal anharmonic constant 
- Sunrise,Sunset and more infomation  
- Moonrise,Moonset and more infomation
- Weather forecast information every hour
　- Weather icon mark (42 kinds) 
　- Atmospheric air pressure (hPa) 
　- Waves direction (by icons) 
　- Waves height (centimeter)
　- Waves cycle (c/m) 
　- Wind direction (16 direction) 
　- Wind speed (m/s) 
　- Temperature (celsius)
　- Humidity (percent)
　- Seawater temperature (celsius) 
　- Precipitation (millimetres)
　- Visibility (0 to 10, 10 is all clear)
- Weather map chart (past, live and forecast)
- News of surfing, fishing and more

▼Additional notes
Some information are shown Japanese Kanji, because that is a place name and unique to Japan.
Especially, name of the tide is unique. It is explained below. 'Shio(潮)' mean tide.

大潮	 (Oh-shio)
It's a day when a lot of tide difference high and low. It's around the full moon and the new moon.
中潮 (Naka-shio)
It's between 大潮 and 小潮.
小潮 (Ko-shio)
It's a day when few of tide difference high and low.
長潮 (Naga-shio)
It's a day after 小潮.
若潮 (Waka-shio)
It's a day that tide starts to move again. It come after 長潮.

The places name is difficult to chang to Roman letters.  So In the app it shown in Japanese Kanji as it was.

If you have any questions, please contact me from CONTACT on the app support or developer website.

## Key features

- Tide graphs for over 340 Japanese locations
- Hourly weather forecasts for 7 days
- Wave direction, height, and cycle information
- Fishing forecasts based on tide times
- Weather maps with 10-day future forecasts
- Daily surfing and fishing news updates
- Home screen widgets for tide and weather data

## Recent user reviews (10 of 50)

All indexed reviews: https://appshunter.io/ios/app/tide-and-weather-surftide/id1420388139/reviews.md

### 5/5 — 素晴らしいさ

*2025-07-25*

いろいろと参考に

### 5/5 — いいね

*2025-06-26*

使いやすい

### 3/5 — 月

*2025-04-18*

月の入り時間出時間を表示して下さい

### 5/5 — 漁師

*2024-12-23*

色々と便利だと思います　最高です
ありがとうございます😊

### 1/5 — iPhoneアップデート後

*2024-12-04*

大変見やすく重宝しておりましたが､今回のiPhoneアップデート後に開かなくなりました…

### 1/5 — 使えない

*2024-10-26*

iPhone  先月くらいから全く立ち上がらなくなりました。100%落ちます。

### 1/5 — 使えない

*2024-10-22*

起動と同時に強制終了するようになって、全く使えない

### 3/5 — 落ちるようになった

*2024-10-21*

Xよりも風の情報が細かく登録地点も多いので、断然△の方が使いやすく釣行時に重宝しています。が、ここ最近、起動直後に高確率で落ちるようになりました。なんとかして欲しいです。iOS17.6.1です。

### 5/5 — N

*2024-07-15*

If ll  l h only yv
Really Pbgll j
K 
 
M
Jen’s c  u

### 5/5 — 無駄な広告もなくて使いやすい

*2024-07-09*

他のタイドグラフアプリは会員登録していないと広告がちょこちょこ出てくるが、このアプリは出てこないので快適です。

## Frequently asked questions about Tide and Weather

### What kind of information does this app provide?

This app provides detailed tide and weather forecasts specifically for Japan. It includes tide graphs, hourly weather predictions for up to 7 days, wave information (direction, height, cycle), and optimal fishing times. It also offers weather maps and daily news relevant to surfing and fishing.

### Is this app suitable for users outside of Japan?

No, the tide information is exclusively for Japanese locations, and the app uses the Japan time zone. While weather data is sourced globally, the primary focus and functionality for tides are limited to Japan.

### How accurate is the tide data?

The tide graphs are calculated using 'Tidal anharmonic constant' within the app, meaning no external data download is required for tide calculations. This ensures immediate access to tide information for around 340 places in Japan.

### What are the fishing forecast features?

The app can identify 'good times' for fishing, which are typically a few hours before and after high or low tide. In Japan, these are referred to as '上げ三分, 上げ七分, 下げ三分, 下げ七分'.

### How can I see weather information for nearby locations?

The app utilizes your device's GPS function to identify nearby tide locations. Once identified, it can display the tide graph and weather forecast for that specific nearby area.

## Version history (last 5 releases)

### 1.4.0 — 2023-01-17

Fixed minor bugs and improved some functions.

### 1.3.9 — 2022-02-21

The processing has been optimized.

### 1.3.8 — 2021-04-29

Fixed some bugs.

### 1.3.7 — 2021-04-25

Improved some functions.

### 1.3.6 — 2021-01-26

I adjusted the text color a bit.

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## More apps by Mitsuhiro Shirai

- [SimpleTide for marine sports](https://appshunter.io/ios/app/simpletide-for-marine-sports/id602646447)
- [Find JP zip code - ZipNoFinder](https://appshunter.io/ios/app/find-jp-zip-code-zipnofinder/id778634221)
- [Tide and Weather - SurfTide7](https://appshunter.io/ios/app/tide-and-weather-surftide7/id804623368)
- [MTSAT informatio Himawari-kun](https://appshunter.io/ios/app/mtsat-informatio-himawari-kun/id1105242641)
- [Surfing record - SurfLog7](https://appshunter.io/ios/app/surfing-record-surflog7/id1250734719)
- [RS Station (michi-no-eki map)](https://appshunter.io/ios/app/rs-station-michi-no-eki-map/id1356047174)

All apps by Mitsuhiro Shirai: https://appshunter.io/developer/602643484

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-31.*