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Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →A G-SHOCK marked 20 bar, WR20BAR, or commonly 200 m is designed for swimming and active everyday water use, according to Casio. The 200 m figure is an approximate depth equivalent for a pressure rating—not a promise that the watch can be worn at that depth. For scuba diving, Casio distinguishes standard G-SHOCK water resistance from FROGMAN models identified as having ISO-standard 200 m diving water resistance.
What 20 bar, WR20BAR and 200 m mean
Bar is a measure of pressure. Casio says that 20-bar water resistance is commonly associated with 200-meter water resistance, with the meter figure expressing an approximate water-depth equivalent. It does not mean an ordinary 20-bar G-SHOCK is guaranteed for use at 200 m. Casio describes the property as water resistance, not unlimited waterproofing. Casio’s water-resistance guidance explains the distinction.
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Check the marking on your watch or its official product page rather than assuming all G-SHOCK watches share the same rating. For example, Casio lists 200-meter water resistance for the GA-2100SRS-7A; that specification applies to that model, not automatically to the whole range.
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Casio says 20-bar G-SHOCK watches are designed for swimming and active water use. Its examples include surfing, jet skiing, showering and rain. The permitted activities depend on the watch’s own rating, so use the exact model’s instructions when in doubt.
#1 Best Overall
- Rugged & Sporty Design – Matte black finish with bold digital display, built for tactical, military, and extreme sports enthusiasts.
- High-Brightness LED Backlight – Features Super Illuminator LED with a light guide plate, ensuring exceptional visibility in low-light conditions.
- 200M Water Resistance – Engineered for swimming, snorkeling, and outdoor adventures, this shock-resistant watch is ready for action.
- Extended 7-Year Battery Life – Powered by a CR2025 battery, offering years of reliable performance without frequent replacements.
- Shock-Resistant Structure – Built to withstand extreme conditions, making it ideal for sports, military, and rugged outdoor use.
Casio’s operating precautions for Module 5719 distinguish among watches with no BAR marking and those rated 5BAR, 10BAR or 20BAR. The table does not list swimming as suitable for a watch with no BAR marking, while it does list swimming as suitable for the three BAR-rated categories. Other activity permissions vary by category. Consult the Module 5719 operating precautions or, for another watch, that watch’s own manual.
Is a standard 200 m G-SHOCK suitable for scuba diving?
Do not treat a standard 200 m marking as equivalent to a dive-watch certification. Casio says standard G-SHOCK 200 m water resistance is intended for many water activities, but a watch for professional scuba diving should be specifically designed and tested for diving. Casio identifies FROGMAN models as having ISO-standard 200 m diving water resistance and points to the line for diving-oriented performance on its US water-resistant-watch collection page.
Rank #2
- Shock-Resistant Durability: Built to withstand the toughest conditions, this G-Shock watch features a rugged resin case and bezel, perfect for outdoor adventures and extreme sports.
- 200M Water Resistance: Designed for water enthusiasts, it’s suitable for scuba diving, swimming, and snorkeling, providing reliable protection up to 200 meters.
- Electro-Luminescent Backlight: The blue-green EL backlight with afterglow ensures clear visibility of the time, day, and date, even in complete darkness.
- Precision Stopwatch & Countdown Timer: Measure elapsed and split times with the 1/100-second stopwatch, or set up a countdown timer with up to a 24-hour range, ideal for timing workouts or daily tasks.
- Multi-Alarm with Flash Alert: Stay on schedule with a customizable alarm, hourly chime, and flash alert that combines light and sound for added convenience.
When comparing watches, consider the exact marked rating, the activity you plan to do, and whether the model is specifically identified as meeting a diving standard. The depth number alone is not enough to establish suitability for scuba diving.
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How to care for a watch after swimming
After exposure to salt water, chlorine, dirt or other residue, Casio recommends rinsing the watch with fresh water and drying it with a soft cloth. Follow the handling instructions for your exact module; do not press buttons underwater unless that model’s documentation explicitly allows it.
Quick Recap
Best Value
Rank #4
- Band Size: Mens-Standard
- Shock Resistant
- Auto LED Light with Afterglow
- Magnetic Resistant
Rank #3
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