Best Overall
Casio G-Shock GWX-5600-1JF
Key details
- Model
- GWX-5600-1JF, Japan market
- Power
- Tough Solar, radio-controlled
- Weight
- 1.98 oz
- Tide And Moon
- Tide function with moon phase
Solar charging and radio-controlled timekeeping are the two things that make a tide watch worth trusting, and this is the only one of the three here with both. A tide graph is calculated from the clock and your home port, so a watch that drifts, or one that dies mid-season, hands you a high tide that is quietly wrong. The GWX-5600 corrects itself from the atomic signal overnight and tops up from whatever light it sits in — and that pairing is the whole reason it takes the top spot.
What surprised us is how little it feels like a G-Shock on the wrist. At 1.98 ounces with a square case, it's the compact one of the group: thin enough to disappear under a work cuff, and the gloss black bezel wipes clean instead of holding onto salt and sunscreen. The tide and moon screens sit a couple of button presses away, and the display reads cleanly rather than cramming every segment onto the screen at once.
Setup is the part nobody warns you about. You choose your home city and enter the lunitidal interval for your stretch of coast — the lag between the moon overhead and high water — and until that number is right the graph is decoration. Do it once, write the figure inside the manual, and you're done. This is the Japan-market model, which is worth knowing before you order, so buy from a seller you trust on returns.
Pros
- Solar charging and atomic timekeeping in one watch
- Compact 1.98-ounce case sits close to the wrist
- Tide and moon screens a button press away
- Gloss bezel wipes clean easily
Cons
- Solar charging slows under winter sleeves
Our pick for most coastal use: solar and atomic keep the tide graph honest, and at 1.98 ounces it's the one you forget you're wearing.