Slackwater: Tides & Weather
Working Model LLC Weather iPhoneiPadiPod touchApple Watch
Slackwater: Tides & Weather is a free Weather app for iPhone and iPad by Working Model LLC. Rated 5.0/5 from 1 ratings. Requires iOS 18.0.
- Rating
- 5.0
- 1 ratings
- Price
- Free
- on the App Store
- Size
- 16 MB
- Age 4+
- Updated
- Sep 24
- 2026 · v2.3
Screenshots
About Slackwater: Tides & Weather
Know the water before you go. Slackwater gives you real-time tides, slack windows, wind, radar, forecasts, and fishing times for 3,600+ NOAA tide stations, from Florida to Alaska to the islands, in one fast, clean app. Whether you're wading a flat at first light, running the bay, or watching the tide from the pier, Slackwater shows what the water's doing now and what it'll do next. TIDES & SLACK • Live water level beside the prediction, so a wind tide is obvious at a glance • High and low times — and the slack window around each one, when the water actually goes slow and for how long • Tide curves: the day at a glance, two days of history behind you, a month ahead • Every NOAA station, with observed water wherever a gauge reports it • Find any station by name, or the nearest with one tap WEATHER & WIND • Current wind, gusts and direction, plus the next 12 hours • Hourly temperature, rain chance and wind for the next 24 hours • Barometric pressure and trend, air temp, water temp, and a 24-hour water temp trend • Sea state — wave height, swell and wind wave, with direction and period • Animated wind layer, plus radar you can scrub 2 hours back or 12 hours ahead • Marine advisories and warnings for your water, on the map and on the station FISHING & PLANNING • Solunar times — major and minor, with a rating for every day • A 30-day calendar: tides, sun and moon, weather and fishing rating, day by day • Sunrise, sunset, moonrise, moonset and moon phase • Save your spots — each one shows its level, next turn, slack window and curve WIDGETS & LOCK SCREEN • Four widgets — Tide Now, Station Board, Window and Day Board — each set to whichever station you want • Widgets draw the measured water over the prediction, so the difference reads at a glance • Tide Now fits the Lock Screen too • Live Activity: follow a station's level, direction and countdown to the turn on the Lock Screen and in the Dynamic Island • Start it from the station page, Control Center, or a Shortcut ALERTS • Tide alerts that arrive ahead of the slack window, not just the turn • Solunar alerts, a morning brief, and optional marine advisories • Alerts can carry a picture of the day's tide curve • Scheduled entirely on your device, with quiet hours PRIVATE BY DESIGN • No ads. No tracking. No account. • Your location never leaves your device. Built for iPhone and iPad. SLACKWATER PRO Try everything free for 7 days, then keep it for $4.99/year — one low yearly price, no ads, and it helps keep the tide servers running. Prefer the web? slackwater.app is always free. • Slackwater Pro — $4.99 per year, with a 7-day free trial • Payment is charged to your Apple ID at the end of the free trial • Auto-renews yearly unless turned off at least 24 hours before the period ends; manage or cancel anytime in your Apple ID settings Tides and weather are for planning and recreation, not navigation or safety-of-life decisions. Always check official sources before heading out. Data from NOAA, the National Weather Service, and the U.S. Naval Observatory, radar via RainViewer, forecast radar from NOAA's HRRR model, forecast grids from Open-Meteo. Terms of Use: https://workingmodel.cc/slackwater-terms.html Privacy Policy: https://workingmodel.cc/slackwater-privacy.html
What’s new
Version 2.3 · Updated September 24, 2026
Slackwater comes to Apple Watch. • Tides on your wrist: the water level against the prediction, where you are in the cycle, and when it goes slack — with the next turn counting down. • Turn the Digital Crown to scrub the tide curve, a full day back. • Complications for every face: the level and trend with a cycle gauge, plus Smart Stack cards for the tide and the curve. Pick any favorite per slot. • Track a tide from your phone and it follows you to the watch. • Works on its own: favorites sync from your iPhone, and the last tide stays cached for when you're out of range. Also in this version: • A monthly plan alongside yearly, both with a 7-day free trial. • Read Slackwater Dispatch inside the app. • The map's side controls are easier to tap.
App privacy
The developer, Working Model LLC, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to Slackwater: Tides & Weather
Looking for apps like Slackwater: Tides & Weather? Here are 6 similar apps on the App Store. The highest rated is Slackwater: Tides & Fishing (5.0/5), and all 6 are free to download.
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Slackwater: Tides & Fishing
5.0
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Tides and Currents-USA
4.2
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Ebb and Flow Tide Clock
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Weather App +
4.8
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SeaWeather WRI
5.0
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NOAA Tides
5.0
| App | Rating | Price | Last updated |
|---|---|---|---|
| Slackwater: Tides & Weather | 5.0 / 5 (1 rating) | Free | September 24, 2026 |
| Slackwater: Tides & Fishing | 5.0 / 5 (2) | Free | Sep 14, 2026 |
| Tides and Currents-USA | 4.2 / 5 (28) | Free | May 26, 2026 |
| Ebb and Flow Tide Clock | 4.0 / 5 (4) | Free | Jul 12, 2026 |
| Weather App + | 4.8 / 5 (28) | Free | Aug 11, 2025 |
| SeaWeather WRI | 5.0 / 5 (1) | Free | Sep 5, 2026 |
| NOAA Tides | 5.0 / 5 (1) | Free | Dec 18, 2025 |