KOAK TAF
Terminal aerodrome forecast for Oakland San Francisco Bay Airport (OAK · KOAK), Oakland, CA. Issued 6 Aug 2026 2320Z, valid 0000Z to 0600Z, decoded period by period below.
All of Oakland San Francisco Bay Airport — runways, frequencies, charts and live weatherTAF issued 6 Aug 2026 2320Z
valid 0000Z to 0600ZTAF KOAK 062320Z 0700/0806 29014KT P6SM SKC FM070400 28007KT P6SM OVC010 FM071700 28010KT P6SM SKC FM080300 28008KT P6SM BKN008
Times are UTC (Zulu), as they appear in the bulletin.
Period by period
| Period (UTC) | Change | Wind | Vis | Ceiling | Sky | Cat |
|---|---|---|---|---|---|---|
| 0000Z to 0400Z | Initial | 290° at 14 kt | 6+ SM | Clear | Clear below 12,000 ft | VFR |
| 0400Z to 1700Z | FM | 280° at 7 kt | 6+ SM | 1,000 ft OVC | Overcast at 1,000 ft AGL | MVFR |
| 1700Z to 0300Z | FM | 280° at 10 kt | 6+ SM | Clear | Clear below 12,000 ft | VFR |
| 0300Z to 0600Z | FM | 280° at 8 kt | 6+ SM | 800 ft BKN | Broken at 800 ft AGL | IFR |
What the change groups mean
- FM
- From — a rapid, permanent change to the conditions that follow.
What the categories mean
- VFR
- Visual flight rules — ceiling above 3,000 ft and visibility greater than 5 SM.
- MVFR
- Marginal VFR — ceiling 1,000 to 3,000 ft and/or visibility 3 to 5 SM.
- IFR
- Instrument flight rules — ceiling 500 to 999 ft and/or visibility 1 to less than 3 SM.
Frequently asked
What is the current TAF for KOAK?
The forecast issued 6 Aug 2026 2320Z for Oakland San Francisco Bay Airport reads: TAF KOAK 062320Z 0700/0806 29014KT P6SM SKC FM070400 28007KT P6SM OVC010 FM071700 28010KT P6SM SKC FM080300 28008KT P6SM BKN008
How far ahead does a TAF forecast?
A TAF covers a 24-hour period at most airports and 30 hours at larger ones, issued four times a day at 0000Z, 0600Z, 1200Z and 1800Z. It describes conditions within roughly 5 statute miles of the airport, not the surrounding area.
What do FM, BECMG and TEMPO mean?
FM (from) marks a rapid, permanent change at the stated time. BECMG (becoming) marks a gradual change over the stated window. TEMPO marks conditions expected for less than half the period, in spells of under an hour each. PROB30 and PROB40 give the probability of the conditions that follow.
More about KOAK
Forecasts from the US National Weather Service Aviation Weather Center. Times are UTC (Zulu). For planning and education only — always confirm with an official preflight briefing.