A300
Flight Crew Air Transport Pilot (ATP)
Communication Breakdown
Inflight Event / Encounter Fuel Issue; Inflight Event / Encounter Weather / Turbulence
Air Traffic Control Provided Assistance; Flight Crew Landed As Precaution; Flight Crew Diverted
Company Policy; Human Factors; Weather
During descent into ZZZ; ATC directed us to hold for unforecast weather overhead the airfield. We slowed to green dot to conserve fuel. Scheduled on deck fuel was 11.3 and we were getting close to that limit without the hold so we sent message to Dispatch via ACARS for options and fuel numbers.  No reply was received. Just prior to reaching holding; ATC informed us the field was now open and landing in the opposite direction from original flight plan which made fuel even more critical. During vectors to new  arrival; we were given new holding instructions and advised the airport was not accepting traffic and was unsure of when it would be open again. At this point; we called up the nearest airports on the FMS and saw ZZZ1 was the closest. After checking the weather for ZZZ1 (reported as VMC) while in holding; we elected to proceed to the divert prior to completing one turn in holding. Landed in ZZZ1 with 7.2. Visual approach and landing to runway 29 was uneventful. During divert to ZZZ1; 3 diversion reports were sent through ACARS and no reply from Dispatch was ever received. During initial descent into ZZZ; there was not enough time/fuel to contact Dispatch via Radio.Cause - Unforecast weather combined with minimum FOD planning left us with few options when faced with  unexpected holding.Suggestions - 3000 extra pounds of gas would have allowed us to hold longer and given us more options.
[Report narrative contained no additional information.]
A300 flight crew reported diverting due to unforecast weather combined with inadequate fuel on board.