Korea Tide Times, Mulddae & Lunar Fishing Info
Last updated: 2026-06-25
Mulddae (the Korean tide phase) numbers the cycle of rising and falling seawater by lunar date. Around the full and new moon the range is largest — the spring tide (sari); around the lunar 8th and 23rd it is smallest — the neap tide (jogeum).
Use Today's tide summary below to see today's tide, lunar date and the countdown to the next spring tide, then jump to the tide calculator, tide calendar or high/low water times.
Today's tide summary
Today
-
| Item | Value |
|---|---|
| Solar date | |
| Lunar date | |
| Tide (mulddae) | |
| Tide phase | |
| Days to next spring tide |
Tide is calculated as a reference value on the West Sea 7-tide system. For more detailed daily tides, see the tide calculator.
Fishing tools
Tide calculator (mulddae)
Pick a date to get the tide number/name, lunar date, spring/neap status and the days to the next spring tide.
Tide calendar (tide table)
Shows the tide, lunar date and spring/neap for every day of a chosen month in one table.
High/low water times
Pick a region to estimate approximate high/low water times, with a slot to connect Korea Hydrographic (KHOA) API data.
Feels-like temperature calculator
Before you go, check the feels-like temperature and suitability from temperature, wind and humidity.
How to use
- Check today's tide — In 'Today's tide summary' above, see today's tide name, lunar date, spring/neap status and the days to the next spring tide.
- Pick a tool — For a specific date use the tide calculator, for a whole month the tide calendar, for high/low water times the tide times tool.
- Plan your trip — Check the tide together with the feels-like temperature and wind, and plan to go out in safe weather.
How tide, lunar date and mulddae relate
Sea level rises and falls twice a day (semidiurnal tide) under the gravity of the moon and sun. Around the full and new moon, when the sun, moon and Earth align, their pull combines into the largest tidal range — the spring tide (sari); at the half moon (around the lunar 8th and 23rd) the pull is offset, giving the smallest range — the neap tide (jogeum). Numbering this cycle against the lunar date gives the mulddae.
| Species | Peak season | Main region | Reference tide |
|---|---|---|---|
| Webfoot octopus (jukkumi) | Sep–Nov | West Sea (Taean, Boryeong) | Mid-tide |
| Cuttlefish | Sep–Nov | West & South Sea | Mid to spring |
| Olive flounder (gwangeo) | Mar–Jun, Oct–Nov | West & East Sea | Mid-tide |
| Korean rockfish (ureok) | Year-round, active spring/autumn | West & South Sea | Mid to spring |
| Red seabream (chamdom) | Apr–Jun, Sep–Nov | South Sea, Jeju | Around spring tide |
| Black seabream (gamseongdom) | Oct–Feb | South & West Sea | Mid-tide |
| Largehead hairtail (galchi) | Jul–Nov | South Sea, Jeju | Neap to mid |
| Mackerel (godeungeo) | Sep–Nov | South & East Sea | Mid-tide |
Peak season and tide are reference values that vary by region, year and water temperature. Real catches also depend on water temperature, weather and fish activity, so before heading out check the wind and temperature with the feels-like temperature calculator and see the outdoor safety guide.
Frequently asked questions (FAQ)
What is mulddae (Korea tide phase)?
Mulddae is the Korean system that numbers the cycle of rising and falling seawater, driven by the gravity of the moon and sun, according to the lunar date. Around the full moon (15th) and new moon (30th) the tidal range is largest — the spring tide (sari); around the lunar 8th and 23rd it is smallest — the neap tide (jogeum).
Is fishing better at spring or neap tide?
It depends on the species and spot. Many fish bite best on moderate mid-tides; during a strong spring tide the current can sweep your rig away, while at neap tide the water barely moves and bites can be slow. Rock float fishing generally prefers a moderate flow.
Which tool should I start with?
If you want the tide and lunar date for a specific day plus the days to the next spring tide, use the tide calculator; for a full month's tide table use the tide calendar; for high/low water times use the high/low water times tool.
What standard does this site's tide use?
It uses the West Sea (Yellow Sea) 7-tide system (lunar 1st/16th = 7-mul, 8th/23rd = neap, 15th/30th = spring). Counting can vary by 1–2 tides depending on the region and fishing village, so use it alongside local notation.
Related tools & guides
Last updated: 2026-06-25